-Illion Numbers

We're all familiar with numbers like million, billion, or trillion - but how far do the "illion" numbers go, the furthest Jonathan Bowers and I've seen in the literature is milli-millillion (10^3000003) which he calls a micrillion. Some time ago (about 15 years or so), being interested in giant numbers, he has invented names for illion numbers past a centillion (highest that me and Jonathan have seen in books at that time) - by continuing the trend: deci, centi, by using milli, micro, nano, pico, femto, and atto. Sometime later, he found out that he wasn't the only one to choose the name "millillion" for 10^3003 - He found this name mentioned on Robert Munafo's fascinating web site on large numbers. Following is a list of the "illion" numbers (those above millillion are names I invented), along with googol, googolplex, and googolduplex for size reference. The ones less than micrillion are shown on the above mentioned web site, naming rules up to the millillion range are mentioned in The Book of Numbers by Conway and Guy. He recently changed some of the numbers to match with the polytope suffixes. In 2022, due to the new prefixes ronna, ronto, quetta, and quecto, he changed a few illion names. In 2024, correction made for location of googoltriplex and bentrizillion as well as a note on the later, thanks to Sbiis Saibian. In 2025, I am Bella Tersumi, I found the numbers that were coined by Sbiis Saibian and other people's number site. I recently told Jonathan Bowers that due to the new suffixes above polymulton, polyprinson, polynoxon, and polyquoilon, I may have renamed 13 illion names and added 3 illion names, I got 16 illions mentioned in the polytope suffixes site. And I made a correction spelling for those two, doedecillion to duodecillion, and tridecillion to tredecillion. Jonathan Bowers might notice me about the correction spelling.

Million - 1,000,000

Billion - 1,000,000,000

Trillion - 1,000,000,000,000

Quadrillion - 1,000,000,000,000,000

Quintillion - 1,000,000,000,000,000,000

Sextillion - 1,000,000,000,000,000,000,000

Septillion - 1,000,000,000,000,000,000,000,000

Octillion - 1,000,000,000,000,000,000,000,000,000

Nonillion - 1,000,000,000,000,000,000,000,000,000,000

Decillion - 1,000,000,000,000,000,000,000,000,000,000,000

Undecillion - 10^36

Duodecillion - 10^39

Tredecillion - 10^42

Quattuordecillion - 10^45

Quindecillion - 10^48

Sexdecillion - 10^51

Septendecillion - 10^54

Octodecillion - 10^57

Novemdecillion - 10^60

Vigintillion - 10^63

Unvigintillion - 10^66

Duovigintillion - 10^69

Trevigintillion - 10^72 - alternively tresvigintillion

Quattuorvigintillion - 10^75

Quinvigintillion - 10^78

Sexvigintillion - 10^81 - alternively sesvigintillion

Septenvigintillion - 10^84 - alternively septemvigintillion

Octovigintillion - 10^87

Novemvigintillion - 10^90

Trigintillion - 10^93

Untrigintillion - 10^66

Duotrigintillion - 10^69

Googol - 10^100 - shown for comparison

Tretrigintillion - 10^102 - alternively trestrigintillion

Quattuortrigintillion - 10^105

Quintrigintillion - 10^108

Sextrigintillion - 10^111 - alternively sestrigintillion

Septentrigintillion - 10^114

Octotrigintillion - 10^117

Novemtrigintillion - 10^120 - alternively noventrigintillion

Quadragintillion - 10^123

Quinquagintillion - 10^153

Sexagintillion - 10^183

Gargoogol - 10^200 - shown for comparison

Septuagintillion - 10^213

Octogintillion - 10^243

Nonagintillion - 10^273

Centillion - 10^303

Uncentillion - 10^306

Duocentillion - 10^309

Centretillion - 10^312 - alternively trescentillion

Googolding - 10^500 - shown for comparison

Ducentillion - 10^603

Trecentillion - 10^903

Googolchime - 10^1000 - shown for comparison

Quadringentillion - 10^1203

Quingentillion - 10^1503

Sescentillion - 10^1803

Septingentillion - 10^2103

Octingentillion - 10^2403

Nongentillion - 10^2703

Millillion - 10^3003

Googolbell - 10^5000 - shown for comparison

*Platillion - 10^6000

Googoltoll - 10^10,000 - shown for comparison

Myrillion - 10^30,003

Googolgong - 10^100,000 - shown for comparison

Micrillion - 10^3,000,003

Googolbong - 10^100,000,000 - shown for comparison

Nanillion - 10^3,000,000,003

Googolthrong - 10^100,000,000,000 - shown for comparison

Picillion - 10^3,000,000,000,003

Femtillion - 10^3,000,000,000,000,003

Attillion - 10^3,000,000,000,000,000,003

Zeptillion - 10^ 3sextillion3

Yoctillion - 10^ 3septillion3

Rontillion - 10^ 3octillion3 - old name xonillion

Quectillion - 10^ 3nonillion3 - old name vecillion

Bramtillion - 10^ 3decillion3 - old name mecillion

Azekillion - 10^ 3undecillion3 - old name duecillion

Trecillion - 10^ 3duodecillion3

Tetrecillion - 10^ 3tredecillion3

Pentecillion - 10^ 3quattuordecillion3

Hexecillion - 10^ 3quindecillion3

Heptecillion - 10^ 3sexdecillion3

Octecillion - 10^ 3septendecillion3

Ennecillion - 10^ 3octodecillion3

Icosillion - 10^ 3novemdecillion3

Meicosillion - 10^ 3vigintillion3

Dueicosillion - 10^ (3x10^66+3)

Trioicosillion - 10^ (3x10^69+3)

Tetreicosillion - 10^ (3x10^72+3)

Penteicosillion - 10^ (3x10^75+3)

Hexeicosillion - 10^ (3x10^78+3)

Hepteicosillion - 10^ (3x10^81+3)

Octeicosillion - 10^ (3x10^84+3)

Enneicosillion - 10^ (3x10^87+3)

Triacontillion - 10^ (3x10^90+3)

Googolplex - 10^10^100 - shown for comparison

Gargoogolplex - 10^ (2x10^100) - shown for comparison

Tetracontillion - 10^ (3x10^120+3)

Pentacontillion - 10^ (3x10^150+3)

Hexacontillion - 10^ (3x10^180+3)

Heptacontillion - 10^ (3x10^210+3)

Octacontillion - 10^ (3x10^240+3)

Ennacontillion - 10^ (3x10^270+3)

Hectillion - 10^ (3x10^300+3)

Dohectillion - 10^ (3x10^600+3)

Triahectillion - 10^ (3x10^900+3)

Tetrahectillion - 10^ (3x10^1200+3)

Pentahectillion - 10^ (3x10^1500+3)

Hexahectillion - 10^ (3x10^1800+3)

Heptahectillion - 10^ (3x10^2100+3)

Octahectillion - 10^ (3x10^2400+3)

Ennahectillion - 10^ (3x10^2700+3)

Killillion - 10^ (3x10^3000+3)

Micrekillillion - 10^ (3x10^6000+3)

Nanekillillion - 10^ (3x10^9000+3)

Picekillillion - 10^ (3x10^12,000+3)

Femtekillillion - 10^ (3x10^15,000+3)

Attekillillion - 10^ (3x10^18,000+3)

Zeptekillillion - 10^ (3x10^21,000+3)

Yoctekillillion - 10^ (3x10^24,000+3)

Rontekillillion - 10^ (3x10^27,000+3) - old name xonekillillion

Quectekillillion - 10^ (3x10^30,000+3) - old name vecekillillion

Googolplexigong - 10^10^100,000 - shown for comparison

Hectekillillion - 10^ (3x10^300,000+3)

Megillion - 10^ (3x10^3,000,000+3)

Gigillion - 10^ (3x10^3,000,000,000+3)

Terillion - 10^ (3x10^3,000,000,000,000+3)

Petillion - 10^ (3x10^3quadrillion +3)

Exillion - 10^ (3x10^3quintillion +3)

Zettillion - 10^ (3x10^3sextillion +3)

Yottillion - 10^ (3x10^3septillion +3)

Ronnillion - 10^ (3x10^3octillion +3) - old name xennillion

Quettillion - 10^ (3x10^3nonillion +3) - old name dakillion, older name vekillion

Bruntillion - 10^ (3x10^3decillion +3) - old name hendillion, older name mekillion

Aganillion - 10^ (3x10^3undecillion +3) - old name dokillion, older name duekillion

Tradakillion - 10^ (3x10^3duodecillion +3) - old name trekillion

Tedakillion - 10^ (3x10^3tredecillion +3) - old name tetrekillion

Pedakillion - 10^ (3x10^3quattuordecillion +3) - old name pentekillion

Exdakillion - 10^ (3x10^3quindecillion +3) - old name hexekillion

Zedakillion - 10^ (3x10^3sexdecillion +3) - old name heptekillion

Yodakillion - 10^ (3x10^3septendecillion +3) - old name octekillion

Rodakillion - 10^ (3x10^3octodecillion +3) - old name nedakillion, older name ennekillion

Ikillion - 10^ (3x10^3novemdecillion +3) - old name twentillion

Ikenillion - 10^ (3x10^3vigintillion +3)

Icodillion - 10^ (3x10^(3x10^66) +3)

Ictrillion - 10^ (3x10^(3x10^69) +3) - old name triatwentillion

Icterillion - 10^ (3x10^(3x10^72) +3)

Icpetillion - 10^ (3x10^(3x10^75) +3)

Ikectillion - 10^ (3x10^(3x10^78) +3)

Iczetillion - 10^ (3x10^(3x10^81) +3)

Ikyotillion - 10^ (3x10^(3x10^84) +3)

Icronillion - 10^ (3x10^(3x10^87) +3) - old name icxenillion

Trakillion - 10^ (3x10^(3x10^90) +3) - old name thirtillion

Googolduplex - 10^10^10^100 - shown for comparison

Tekillion - 10^ (3x10^(3x10^120) +3) - old name fortillion

Pekillion - 10^ (3x10^(3x10^150) +3) - old name fiftillion

Exakillion - 10^ (3x10^(3x10^180) +3) - old name sixtillion

Zakillion - 10^ (3x10^(3x10^210) +3) - old name seventillion

Yokillion - 10^ (3x10^(3x10^240) +3) - old name eightillion

Rokillion - 10^ (3x10^(3x10^270) +3) - old name nekillion, older name nintillion

Hotillion - 10^ (3x10^(3x10^300) +3) - old name hundrillion

Botillion - 10^ (3x10^(3x10^600) +3)

Trotillion - 10^ (3x10^(3x10^900) +3)

Totillion - 10^ (3x10^(3x10^1200) +3)

Potillion - 10^ (3x10^(3x10^1500) +3)

Exotillion - 10^ (3x10^(3x10^1800) +3)

Zotillion - 10^ (3x10^(3x10^2100) +3)

Yootillion - 10^ (3x10^(3x10^2400) +3)

Rotillion - 10^ (3x10^(3x10^2700) +3) - old name notillion

Kalillion - 10^ (3x10^(3x10^3000) +3) - old name thousillion

Dalillion - 10^ (3x10^(3x10^6000) +3)

Tralillion - 10^ (3x10^(3x10^9000) +3)

Talillion - 10^ (3x10^(3x10^12,000) +3)

Palillion - 10^ (3x10^(3x10^15,000) +3)

Exalillion - 10^ (3x10^(3x10^18,000) +3)

Zalillion - 10^ (3x10^(3x10^21,000) +3)

Yalillion - 10^ (3x10^(3x10^24,000) +3)

Ralillion - 10^ (3x10^(3x10^27,000) +3) - old name nalillion

Dakalillion - 10^ (3*10^ (3*10^30,000) +3) - also called *manillion

Hotalillion - 10^ (3*10^ (3*10^300,000) +3) - also called *lakhillion

Mejillion - 10^ (3x10^(3x10^3,000,000) +3)

Dakejillion - 10^ (3*10^ (3*10^30,000,000) +3) - also called *crorillion

Hotejillion - 10^ (3*10^ (3*10^300,000,000) +3) - also called *awkillion

Gijillion - 10^ (3x10^(3x10^3,000,000,000) +3)

Dakijillion - 10^ (3x10^(3x10^30,000,000,000) +3)

Hotijillion - 10^ (3x10^(3x10^300,000,000,000) +3)

Astillion - 10^ (3x10^(3x10^3,000,000,000,000) +3)

Lunillion - 10^ (3x10^(3x10^3quadrillion) +3)

Fermillion - 10^ (3x10^(3x10^3quintillion) +3)

Jovillion - 10^ (3x10^(3x10^3sextillion) +3)

Solillion - 10^ (3x10^(3x10^3septillion) +3)

Betillion - 10^ (3x10^(3x10^3octillion) +3)

Glocillion - 10^ (3x10^(3x10^3nonillion) +3)

Gaxillion - 10^ (3x10^(3x10^3decillion) +3)

Supillion - 10^ (3x10^(3x10^3undecillion) +3)

Versillion - 10^ (3x10^(3x10^3duodecillion) +3)

Multillion - 10^ (3x10^(3x10^3tredecillion) +3)

Pyrillion - 10^ (3x10^(3x10^3quattuordecillion) +3)

Guntillion - 10^ (3x10^(3x10^3quindecillion) +3)

Kentrillion - 10^ (3x10^(3x10^3sexdecillion) +3)

Onlillion - 10^ (3x10^(3x10^septendecillion) +3)

Paptrillion - 10^ (3x10^(3x10^3octodecillion) +3)

Housillion - 10^ (3x10^(3x10^3novemdecillion) +3)

Housalillion - 10^ (3x10^(3x10^3vigintillion) +3)

Housejillion - 10^ (3x10^(3x10^(3x10^66)) +3)

Housijillion - 10^ (3x10^(3x10^(3x10^69)) +3)

Housastillion - 10^ (3x10^(3x10^(3x10^72)) +3)

Housunillion - 10^ (3x10^(3x10^(3x10^75)) +3)

Housermillion - 10^ (3x10^(3x10^(3x10^78)) +3)

Housovillion - 10^ (3x10^(3x10^(3x10^81)) +3)

Housolillion - 10^ (3x10^(3x10^(3x10^84)) +3)

Housetillion - 10^ (3x10^(3x10^(3x10^87)) +3)

Trongillion - 10^ (3x10^(3x10^(3x10^90)) +3)

Googoltriplex - 10^10^10^10^100 - shown for comparison

Batillion - 10^ (3x10^(3x10^(3x10^120)) +3)

Handrillion - 10^ (3x10^(3x10^(3x10^150)) +3)

Mastillion - 10^ (3x10^(3x10^(3x10^180)) +3)

Gotillion - 10^ (3x10^(3x10^(3x10^210)) +3)

Kortillion - 10^ (3x10^(3x10^(3x10^240)) +3)

Nenkillion - 10^ (3x10^(3x10^(3x10^270)) +3)

Hovillion - 10^ (3x10^(3x10^(3x10^300)) +3) - old name janillion

Hybrillion - 10^ (3x10^(3x10^(3x10^3,000)) +3) - old name febrillion

Glocybrillion - 10^ (3x10^(3x10^(3x10^30,000)) +3)

Hovybrillion - 10^ (3x10^(3x10^(3x10^300,000)) +3)

Vantillion - 10^ (3x10^(3x10^(3x10^3,000,000)) +3) - old name marillion

Velcillion - 10^ (3x10^(3x10^(3x10^3,000,000,000)) +3) - old name aprillion

*Bentrizillion - 10^ (6*10^(6*10^(6*10^6,000,000,000)))

Compillion - 10^ (3x10^(3x10^(3x10^3trillion)) +3) - old name mayillion

Pictillion - 10^ (3x10^(3x10^(3x10^3quadrillion)) +3) - old name junillion

Beignillion - 10^ (3x10^(3x10^(3x10^3quintillion)) +3) - old name julillion

Bustillion - 10^ (3x10^(3x10^(3x10^3sextillion)) +3) - old name augillion

Celsillion - 10^ (3x10^(3x10^(3x10^3septillion)) +3) - old name septembillion

Jackillion - 10^ (3x10^(3x10^(3x10^3octillion)) +3) - old name octobillion

Macarillion - 10^ (3x10^(3x10^(3x10^3nonillion)) +3) - old name novembillion

Bloxillion - 10^ (3x10^(3x10^(3x10^3decillion)) +3) - old name decembillion

Golthillion - 10^ (3x10^(3x10^(3x10^3undecillion)) +3)

Bandillion - 10^ (3x10^(3x10^(3x10^3duodecillion)) +3)

Touchillion - 10^ (3x10^(3x10^(3x10^3tredecillion)) +3)

Mangillion - 10^ (3x10^(3x10^(3x10^3quattuordecillion)) +3)

Aquillion - 10^ (3x10^(3x10^(3x10^3quindecillion)) +3)

Grafillion - 10^ (3x10^(3x10^(3x10^3sexdecillion)) +3)

Westillion - 10^ (3x10^(3x10^(3x10^3septendecillion)) +3)

Aurillion - 10^ (3x10^(3x10^(3x10^3octodecillion)) +3)

Hazillion - 10^ (3x10^(3x10^(3x10^3novemdecillion)) +3)

Fuelillion - 10^ (3x10^(3x10^(3x10^3vigintillion)) +3)

Mavillion - 10^ (3x10^(3x10^(3x10^(3x10^66))) +3)

Retrillion - 10^ (3x10^(3x10^(3x10^(3x10^69))) +3)

Alpillion - 10^ (3x10^(3x10^(3x10^(3x10^72))) +3)

Googolquadriplex - 10^10^10^10^10^100 - shown for comparison

Googolquintiplex - 10^10^10^10^10^10^100 - shown for comparison

Googolsextiplex - 10^10^10^10^10^10^10^100 - shown for comparison

* - Number names denoted with an asterisk were mentioned to me, but I have no idea where they originated. They may been named according to the long scale illions (British version), so bentrizillion may end in 6*10^(6*10^12) instead of 6*10^(6*10^9), we can call the former 'long bentrizillion' and the later 'short bentrizillion'.

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