After a quintillionaire, the next level of wealth is typically referred to as a sextillionaire, which signifies having a net worth of at least one sextillion units of currency. In the numerical scale, one sextillion is one thousand times a quintillion. However, these terms are largely theoretical, as no individuals have been documented to reach such extraordinary levels of wealth.
After trillionaire, there is the quadrillionaire (tri = three and quad = four, etc.), and after that is the quintillionaire (because quint = five).
The wealth line up is as follows: Millionaire (6 zeros) Billionaire (9 zeros) Trillionaire (12 zeros) Quadrillionaire (15 zeros) Quintillionaire (18 zeros) Sextillionaire (21 zeros) Septillionaire (24 zeros) Octillionaire (27 zeros) Nonillionaire (30 zeros)
Extremely popular?If someone had 1 x 1019 (which would be a 20 digit number) pounds then they would have 10 quintillion pounds! I suppose this would make them a quintillionaire!Of course this terminology assumes you are using the American / seemingly "modern British" definitions and not the traditional English definition.