zetta-(redirected from 1000000000000000000000 (number))
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Prefix used in the metric system and SI to signify one sextillion (1021).
[var. of L. septem, seven (zetta- being 7th in the series of SI multiple prefixes)]
zetta-[Fm. L. septem, seven, representing the seventh power of a thousand]
In the International System of Units (SI), a prefix signifying 1021 .