23131323112321 has 4 divisors (see below), whose sum is σ = 23150712319812. Its totient is φ = 23111933904832.

The previous prime is 23131323112297. The next prime is 23131323112411. The reversal of 23131323112321 is 12321132313132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18429299500096 + 4702023612225 = 4292936^2 + 2168415^2 .

It is a cyclic number.

It is not a de Polignac number, because 23131323112321 - 2¹³ = 23131323104129 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23131323112321.

It is not an unprimeable number, because it can be changed into a prime (23131323112721) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 9694601956 + ... + 9694604341.

It is an arithmetic number, because the mean of its divisors is an integer number (5787678079953).

Almost surely, 2^{23131323112321} is an apocalyptic number.

It is an amenable number.

23131323112321 is a deficient number, since it is larger than the sum of its proper divisors (19389207491).

23131323112321 is a wasteful number, since it uses less digits than its factorization.

23131323112321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19389207490.

The product of its digits is 3888, while the sum is 28.

Adding to 23131323112321 its reverse (12321132313132), we get a palindrome (35452455425453).

The spelling of 23131323112321 in words is "twenty-three trillion, one hundred thirty-one billion, three hundred twenty-three million, one hundred twelve thousand, three hundred twenty-one".