312331213213 has 16 divisors (see below), whose sum is σ = 315768196800. Its totient is φ = 308919312000.

The previous prime is 312331213193. The next prime is 312331213223. The reversal of 312331213213 is 312312133213.

It is a cyclic number.

It is not a de Polignac number, because 312331213213 - 2²⁵ = 312297658781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312331213223) 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 15 ways as a sum of consecutive naturals, for example, 21126058 + ... + 21140836.

It is an arithmetic number, because the mean of its divisors is an integer number (19735512300).

Almost surely, 2^312331213213 is an apocalyptic number.

It is an amenable number.

312331213213 is a deficient number, since it is larger than the sum of its proper divisors (3436983587).

312331213213 is a wasteful number, since it uses less digits than its factorization.

312331213213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15612.

The product of its digits is 1944, while the sum is 25.

Adding to 312331213213 its reverse (312312133213), we get a palindrome (624643346426).

The spelling of 312331213213 in words is "three hundred twelve billion, three hundred thirty-one million, two hundred thirteen thousand, two hundred thirteen".