23131122321 has 4 divisors (see below), whose sum is σ = 30841496432. Its totient is φ = 15420748212.

The previous prime is 23131122317. The next prime is 23131122323. The reversal of 23131122321 is 12322113132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 23131122321 - 2² = 23131122317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23131122323) 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, 3855187051 + ... + 3855187056.

It is an arithmetic number, because the mean of its divisors is an integer number (7710374108).

Almost surely, 2^23131122321 is an apocalyptic number.

It is an amenable number.

23131122321 is a deficient number, since it is larger than the sum of its proper divisors (7710374111).

23131122321 is an equidigital number, since it uses as much as digits as its factorization.

23131122321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7710374110.

The product of its digits is 432, while the sum is 21.

Adding to 23131122321 its reverse (12322113132), we get a palindrome (35453235453).

The spelling of 23131122321 in words is "twenty-three billion, one hundred thirty-one million, one hundred twenty-two thousand, three hundred twenty-one".