23131220213312 has 56 divisors (see below), whose sum is σ = 46589899382880. Its totient is φ = 11392061091840.

The previous prime is 23131220213263. The next prime is 23131220213377. The reversal of 23131220213312 is 21331202213132.

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 7 ways as a sum of consecutive naturals, for example, 53991239 + ... + 54417977.

It is an arithmetic number, because the mean of its divisors is an integer number (831962488980).

Almost surely, 2^{23131220213312} is an apocalyptic number.

It is an amenable number.

23131220213312 is an abundant number, since it is smaller than the sum of its proper divisors (23458679169568).

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

23131220213312 is a wasteful number, since it uses less digits than its factorization.

23131220213312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439459 (or 439449 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 23131220213312 its reverse (21331202213132), we get a palindrome (44462422426444).

The spelling of 23131220213312 in words is "twenty-three trillion, one hundred thirty-one billion, two hundred twenty million, two hundred thirteen thousand, three hundred twelve".