21002022112002 has 32 divisors (see below), whose sum is σ = 44239936084992. Its totient is φ = 6633714686544.

The previous prime is 21002022111977. The next prime is 21002022112031. The reversal of 21002022112002 is 20021122020012.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 711146758 + ... + 711176289.

It is an arithmetic number, because the mean of its divisors is an integer number (1382498002656).

Almost surely, 2^{21002022112002} is an apocalyptic number.

21002022112002 is an abundant number, since it is smaller than the sum of its proper divisors (23237913972990).

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

21002022112002 is a wasteful number, since it uses less digits than its factorization.

21002022112002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1422323182.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21002022112002 its reverse (20021122020012), we get a palindrome (41023144132014).

The spelling of 21002022112002 in words is "twenty-one trillion, two billion, twenty-two million, one hundred twelve thousand, two".