23131312321 has 8 divisors (see below), whose sum is σ = 24912224064. Its totient is φ = 21350626320.

The previous prime is 23131312279. The next prime is 23131312357. The reversal of 23131312321 is 12321313132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23131312321 - 2²⁹ = 22594441409 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23131312292 and 23131312301.

It is not an unprimeable number, because it can be changed into a prime (23131312121) 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 7 ways as a sum of consecutive naturals, for example, 199356 + ... + 293266.

It is an arithmetic number, because the mean of its divisors is an integer number (3114028008).

Almost surely, 2^23131312321 is an apocalyptic number.

It is an amenable number.

23131312321 is a deficient number, since it is larger than the sum of its proper divisors (1780911743).

23131312321 is a wasteful number, since it uses less digits than its factorization.

23131312321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112871.

The product of its digits is 648, while the sum is 22.

Adding to 23131312321 its reverse (12321313132), we get a palindrome (35452625453).

The spelling of 23131312321 in words is "twenty-three billion, one hundred thirty-one million, three hundred twelve thousand, three hundred twenty-one".