21000210020202 has 96 divisors (see below), whose sum is σ = 52167502075392. Its totient is φ = 5605718269536.

The previous prime is 21000210020143. The next prime is 21000210020221. The reversal of 21000210020202 is 20202001200012.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 35821108 + ... + 36402639.

It is an arithmetic number, because the mean of its divisors is an integer number (543411479952).

Almost surely, 2^{21000210020202} is an apocalyptic number.

21000210020202 is an abundant number, since it is smaller than the sum of its proper divisors (31167292055190).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21000210020202 is a wasteful number, since it uses less digits than its factorization.

21000210020202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72223832 (or 72223825 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 21000210020202 its reverse (20202001200012), we get a palindrome (41202211220214).

The spelling of 21000210020202 in words is "twenty-one trillion, two hundred ten million, twenty thousand, two hundred two".