22021311311972 has 12 divisors (see below), whose sum is σ = 44042622624000. Its totient is φ = 9437704847976.

The previous prime is 22021311311971. The next prime is 22021311312029. The reversal of 22021311311972 is 27911311312022.

22021311311972 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (22021311311971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 393237701972 + ... + 393237702027.

It is an arithmetic number, because the mean of its divisors is an integer number (3670218552000).

Almost surely, 2^{22021311311972} is an apocalyptic number.

It is an amenable number.

22021311311972 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

22021311311972 is a wasteful number, since it uses less digits than its factorization.

22021311311972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786475404010 (or 786475404008 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 35.

Adding to 22021311311972 its reverse (27911311312022), we get a palindrome (49932622623994).

The spelling of 22021311311972 in words is "twenty-two trillion, twenty-one billion, three hundred eleven million, three hundred eleven thousand, nine hundred seventy-two".