12310312331 has 4 divisors (see below), whose sum is σ = 12315088200. Its totient is φ = 12305536464.

The previous prime is 12310312309. The next prime is 12310312349. The reversal of 12310312331 is 13321301321.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12310312331 is a prime.

It is a super-2 number, since 2×12310312331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12310318331) 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, 2384066 + ... + 2389223.

It is an arithmetic number, because the mean of its divisors is an integer number (3078772050).

Almost surely, 2^12310312331 is an apocalyptic number.

12310312331 is a deficient number, since it is larger than the sum of its proper divisors (4775869).

12310312331 is an equidigital number, since it uses as much as digits as its factorization.

12310312331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4775868.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 12310312331 its reverse (13321301321), we get a palindrome (25631613652).

The spelling of 12310312331 in words is "twelve billion, three hundred ten million, three hundred twelve thousand, three hundred thirty-one".