sextillion

noun, plural sex·til·lions, (as after a numeral) sex·til·lion.

1. a cardinal number represented in the U.S. by 1 followed by 21 zeros, and in Great Britain by 1 followed by 36 zeros.

adjective

2. amounting to one sextillion in number.

noun plural -lions or -lion

1. (in Britain, France, and Germany) the number represented as one followed by 36 zeros (10 36)
2. (in the US and Canada) the number represented as one followed by 21 zeros (10 21)

n.1680s, from Latin sext-, comb. form of sex “six” (see six) + (m)illion. Cf. billion. Related: Sextillionth.