312012331132321 has 4 divisors (see below), whose sum is σ = 312012389649600. Its totient is φ = 312012272615044.

The previous prime is 312012331132319. The next prime is 312012331132363. The reversal of 312012331132321 is 123231133210213.

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 not a de Polignac number, because 312012331132321 - 2¹ = 312012331132319 is a prime.

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 312012331132321.

It is not an unprimeable number, because it can be changed into a prime (312012331132391) 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, 20358181 + ... + 32225458.

It is an arithmetic number, because the mean of its divisors is an integer number (78003097412400).

Almost surely, 2^{312012331132321} is an apocalyptic number.

It is an amenable number.

312012331132321 is a deficient number, since it is larger than the sum of its proper divisors (58517279).

312012331132321 is an equidigital number, since it uses as much as digits as its factorization.

312012331132321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58517278.

The product of its (nonzero) digits is 3888, while the sum is 28.

Adding to 312012331132321 its reverse (123231133210213), we get a palindrome (435243464342534).

The spelling of 312012331132321 in words is "three hundred twelve trillion, twelve billion, three hundred thirty-one million, one hundred thirty-two thousand, three hundred twenty-one".