23131324400321 has 4 divisors (see below), whose sum is σ = 23133792804144. Its totient is φ = 23128855996500.

The previous prime is 23131324400263. The next prime is 23131324400333. The reversal of 23131324400321 is 12300442313132.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23131324400321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23131324400341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1234187855 + ... + 1234206596.

It is an arithmetic number, because the mean of its divisors is an integer number (5783448201036).

Almost surely, 2^{23131324400321} is an apocalyptic number.

It is an amenable number.

23131324400321 is a deficient number, since it is larger than the sum of its proper divisors (2468403823).

23131324400321 is an equidigital number, since it uses as much as digits as its factorization.

23131324400321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2468403822.

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 23131324400321 its reverse (12300442313132), we get a palindrome (35431766713453).

The spelling of 23131324400321 in words is "twenty-three trillion, one hundred thirty-one billion, three hundred twenty-four million, four hundred thousand, three hundred twenty-one".