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vigintillion

/ˌvɪdʒɪnˈtɪljən/

The number 10⁶³ in the short scale

From Latin viginti (twenty) + French / Italian number-naming tradition illion (a named large number or a power-of-thousand suffix).

noun
adjective
interjection
viginti
Classical Latin
vigintī
“twenty”; the numerical basis of the word
Scientific Latin / English combining form
viginti-
Combining form used in names built from Latin numerals
illion
French / Italian number-naming tradition
-illion
A productive large-number suffix modeled on million and related names
Modern English
-illion
Suffix for names of successive powers of one thousand
Combined
viginti- + -illion → vigintillion
The Latin numeral stem combines with the large-number suffix.
Modern English
vigintillion
In the short scale, 1 followed by 63 zeros, or 10⁶³
Modern English
vigintillion

Picture a medieval or early-modern number-maker stacking names onto a familiar giant: million, billion, trillion, and onward. The front half is much older and more dignified than the whole word looks: Latin vigintī meant “twenty,” and English still preserves that numeral in the combining form viginti-. The ending belongs to the expandable family of -illion names, a pattern that lets mathematicians keep marching through enormous quantities without writing endless zeros. In modern short-scale English, vigintillion means 10⁶³—one followed by sixty-three zeros—which is large enough to make ordinary “a lot” look comically underdressed. The word is therefore a linguistic machine: Latin supplies the number twenty, while -illion turns it into an astronomical-sized quantity; vigintillion is what happens when a classical numeral puts on a very, very long coat.

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