21001202220002 has 16 divisors (see below), whose sum is σ = 31507017751800. Its totient is φ = 10498863123840.

The previous prime is 21001202219929. The next prime is 21001202220017. The reversal of 21001202220002 is 20002220210012.

It can be written as a sum of positive squares in 4 ways, for example, as 4940977654561 + 16060224565441 = 2222831^2 + 4007521^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 508865024 + ... + 508906292.

Almost surely, 2^{21001202220002} is an apocalyptic number.

21001202220002 is a deficient number, since it is larger than the sum of its proper divisors (10505815531798).

21001202220002 is a wasteful number, since it uses less digits than its factorization.

21001202220002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77221.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21001202220002 its reverse (20002220210012), we get a palindrome (41003422430014).

The spelling of 21001202220002 in words is "twenty-one trillion, one billion, two hundred two million, two hundred twenty thousand, two".