10^15 = quadrillion
10^18 = quintillion
10^21 = sexillion
10^24 = septillion
10^27 = octillion
10^30 = nonillion
10^33 = decillion
10^36 = undecillion
10^39 = duodecillion
10^42 = tredecillion
10^45 = quattuordecillion
10^48 = quindecillion
10^51 = sexdecillion
10^54 = septdecillion
10^57 = octodecillion
10^60 = novemdecillion
10^63 = vigintillion
10^66 = unvigintillion
10^69 = duovigintillion
10^72 = trevigintillion
10^75 = quattuorvigintillion
10^78 = quinvigintillion
10^81 = sexvigintillion
10^84 = septvigintillion
10^87 = octovigintillion
10^90 = novemvigintillion
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699 comes before and 701 comes after
999000000000001 comes after 999000000000000.
10 10 comes after 9
a tillion is the unit that comes after nonillion
1995 comes after 1994.