22131320312420 has 96 divisors (see below), whose sum is σ = 50748493251456. Its totient is φ = 8040192768000.

The previous prime is 22131320312369. The next prime is 22131320312441. The reversal of 22131320312420 is 2421302313122.

It is a self number, because there is not a number n which added to its sum of digits gives 22131320312420.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1357658270 + ... + 1357674570.

It is an arithmetic number, because the mean of its divisors is an integer number (528630138036).

Almost surely, 2^{22131320312420} is an apocalyptic number.

22131320312420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22131320312420 is an abundant number, since it is smaller than the sum of its proper divisors (28617172939036).

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

22131320312420 is a wasteful number, since it uses less digits than its factorization.

22131320312420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21741 (or 21739 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 22131320312420 its reverse (2421302313122), we get a palindrome (24552622625542).

The spelling of 22131320312420 in words is "twenty-two trillion, one hundred thirty-one billion, three hundred twenty million, three hundred twelve thousand, four hundred twenty".