A vigintillion is represented in short scale (American and modern British) usage as 1 followed by 63 zeroes, while it is represented in long scale (continental European and traditional British) usage as 1 followed by 120 zeroes.
In the US, there are 9 zeros in a billion and 12 in a trillion. In some parts of Europe and in Latin America, there are 12 zeros in a billion and 18 in a trillion. This scale was used in the UK until...