In the following sentence:
In this sentence, 万亿 is used instead of 兆, to express 10^12 digit.
So when should I use 万亿 and when 兆 to express such a large number?
And also what about the case to express more than 万亿, such as 10^16?
Japanese use 万, 亿, 兆, 京... but how about Chinese? Should I write it as 91万万亿2513万亿522亿6915万159 to express 912513052269150159? or 91京2513兆522亿6915万159?