21200211222 has 32 divisors (see below), whose sum is σ = 44473218048. Its totient is φ = 6724455936.

The previous prime is 21200211203. The next prime is 21200211239. The reversal of 21200211222 is 22211200212.

It is a congruent number.

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, 371358 + ... + 424625.

It is an arithmetic number, because the mean of its divisors is an integer number (1389788064).

Almost surely, 2^21200211222 is an apocalyptic number.

21200211222 is an abundant number, since it is smaller than the sum of its proper divisors (23273006826).

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

21200211222 is a wasteful number, since it uses less digits than its factorization.

21200211222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796204.

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

Adding to 21200211222 its reverse (22211200212), we get a palindrome (43411411434).

The spelling of 21200211222 in words is "twenty-one billion, two hundred million, two hundred eleven thousand, two hundred twenty-two".