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googolplexian

/ˌɡuːɡəlˈplɛksiən/

A one followed by a googolplex zeroes

From American English googolplex (An enormous named number: 10^(googol)).

noun
adjective
googolplex
American English
googol
A coined name for 10¹⁰⁰, invented in 1920 by Milton Sirotta.
American English
googolplex
Googol + -plex; a 1 followed by a googol zeroes, coined in 1920.
-ian
English derivational suffix
-ian
A suffix forming words meaning “of, relating to, or characterized by”; here it extends a number name.
Combined
googolplex + -ian → googolplexian
The suffix turns googolplex into a further number name, conventionally describing a 1 followed by a googolplex zeroes.
Modern English
googolplexian

In 1920, mathematician Edward Kasner asked his young nephew Milton Sirotta to invent a name for 10¹⁰⁰, and the boy supplied “googol”—a playful word that later inspired “googolplex.” Kasner published the idea in Mathematics and the Imagination in 1940, giving arithmetic a name that sounds less like a theorem and more like a cartoon character. Add the familiar suffix -ian, and googolplexian becomes a number-name stretched one astronomical notch further: a 1 followed by a googolplex zeroes. The suffix itself appears in words such as Appalachian and Einsteinian, where it means “connected with,” but here it behaves like a linguistic escalator for absurd size. The memorable trick is that googolplexian is not merely “very large”: it is a number whose written-out zeroes would themselves be counted by another famously impossible number.

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