312220113321 has 4 divisors (see below), whose sum is σ = 416293484432. Its totient is φ = 208146742212.

The previous prime is 312220113311. The next prime is 312220113343. The reversal of 312220113321 is 123311022213.

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 not a de Polignac number, because 312220113321 - 2²⁵ = 312186558889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312220113311) 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, 52036685551 + ... + 52036685556.

It is an arithmetic number, because the mean of its divisors is an integer number (104073371108).

Almost surely, 2^312220113321 is an apocalyptic number.

It is an amenable number.

312220113321 is a deficient number, since it is larger than the sum of its proper divisors (104073371111).

312220113321 is a wasteful number, since it uses less digits than its factorization.

312220113321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104073371110.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 312220113321 its reverse (123311022213), we get a palindrome (435531135534).

The spelling of 312220113321 in words is "three hundred twelve billion, two hundred twenty million, one hundred thirteen thousand, three hundred twenty-one".