2312311323131 has 4 divisors (see below), whose sum is σ = 2312396371152. Its totient is φ = 2312226275112.

The previous prime is 2312311323089. The next prime is 2312311323151. The reversal of 2312311323131 is 1313231132132.

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

It is a cyclic number.

It is not a de Polignac number, because 2312311323131 - 2²² = 2312307128827 is a prime.

It is a super-2 number, since 2×2312311323131² (a number of 26 digits) contains 22 as substring.

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 2312311323131.

It is not an unprimeable number, because it can be changed into a prime (2312311323151) 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, 42483215 + ... + 42537608.

It is an arithmetic number, because the mean of its divisors is an integer number (578099092788).

Almost surely, 2^{2312311323131} is an apocalyptic number.

2312311323131 is a deficient number, since it is larger than the sum of its proper divisors (85048021).

2312311323131 is an equidigital number, since it uses as much as digits as its factorization.

2312311323131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85048020.

The product of its digits is 1944, while the sum is 26.

Adding to 2312311323131 its reverse (1313231132132), we get a palindrome (3625542455263).

The spelling of 2312311323131 in words is "two trillion, three hundred twelve billion, three hundred eleven million, three hundred twenty-three thousand, one hundred thirty-one".