sextillion Meaning, Definition & Usage

  1. noun the number that is represented as a one followed by 21 zeros

WordNet

Sex*til"lion noun
Etymology
Formed (in imitation of million) fr. L. sextus sixth, sex six: cf. F. sextilion.
Definitions
  1. According to the method of numeration (which is followed also in the United States), the number expressed by a unit with twenty-one ciphers annexed. According to the English method, a million raised to the sixth power, or the number expressed by a unit with thirty-six ciphers annexed. See Numeration.

Webster 1913