312122333321 has 4 divisors (see below), whose sum is σ = 312193323012. Its totient is φ = 312051343632.

The previous prime is 312122333309. The next prime is 312122333329. The reversal of 312122333321 is 123333221213.

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

It can be written as a sum of positive squares in 2 ways, for example, as 174285375625 + 137836957696 = 417475^2 + 371264^2 .

It is a cyclic number.

It is not a de Polignac number, because 312122333321 - 2³⁸ = 37244426377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312122333329) 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, 35488250 + ... + 35497043.

It is an arithmetic number, because the mean of its divisors is an integer number (78048330753).

Almost surely, 2^312122333321 is an apocalyptic number.

It is an amenable number.

312122333321 is a deficient number, since it is larger than the sum of its proper divisors (70989691).

312122333321 is an equidigital number, since it uses as much as digits as its factorization.

312122333321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70989690.

The product of its digits is 3888, while the sum is 26.

Adding to 312122333321 its reverse (123333221213), we get a palindrome (435455554534).

The spelling of 312122333321 in words is "three hundred twelve billion, one hundred twenty-two million, three hundred thirty-three thousand, three hundred twenty-one".