21201111202002 has 16 divisors (see below), whose sum is σ = 42402502769472. Its totient is φ = 7066990339760.

The previous prime is 21201111201973. The next prime is 21201111202049. The reversal of 21201111202002 is 20020211110212.

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, 10692393 + ... + 12519164.

It is an arithmetic number, because the mean of its divisors is an integer number (2650156423092).

Almost surely, 2^{21201111202002} is an apocalyptic number.

21201111202002 is an abundant number, since it is smaller than the sum of its proper divisors (21201391567470).

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

21201111202002 is a wasteful number, since it uses less digits than its factorization.

21201111202002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23363793.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21201111202002 its reverse (20020211110212), we get a palindrome (41221322312214).

The spelling of 21201111202002 in words is "twenty-one trillion, two hundred one billion, one hundred eleven million, two hundred two thousand, two".