21222363202156 has 48 divisors (see below), whose sum is σ = 40827192940800. Its totient is φ = 9607696414272.

The previous prime is 21222363202141. The next prime is 21222363202163. The reversal of 21222363202156 is 65120236322212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2884186 + ... + 7124833.

It is an arithmetic number, because the mean of its divisors is an integer number (850566519600).

Almost surely, 2^{21222363202156} is an apocalyptic number.

It is an amenable number.

21222363202156 is a deficient number, since it is larger than the sum of its proper divisors (19604829738644).

21222363202156 is a wasteful number, since it uses less digits than its factorization.

21222363202156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10010278 (or 10010276 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 37.

Adding to 21222363202156 its reverse (65120236322212), we get a palindrome (86342599524368).

The spelling of 21222363202156 in words is "twenty-one trillion, two hundred twenty-two billion, three hundred sixty-three million, two hundred two thousand, one hundred fifty-six".