21211202202 has 16 divisors (see below), whose sum is σ = 42797825280. Its totient is φ = 7007830592.

The previous prime is 21211202189. The next prime is 21211202219. The reversal of 21211202202 is 20220211212.

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, 15641802 + ... + 15643157.

It is an arithmetic number, because the mean of its divisors is an integer number (2674864080).

Almost surely, 2^21211202202 is an apocalyptic number.

21211202202 is an abundant number, since it is smaller than the sum of its proper divisors (21586623078).

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

21211202202 is a wasteful number, since it uses less digits than its factorization.

21211202202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31285077.

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

Adding to 21211202202 its reverse (20220211212), we get a palindrome (41431413414).

The spelling of 21211202202 in words is "twenty-one billion, two hundred eleven million, two hundred two thousand, two hundred two".