312220122331 has 4 divisors (see below), whose sum is σ = 336237054832. Its totient is φ = 288203189832.

The previous prime is 312220122329. The next prime is 312220122341. The reversal of 312220122331 is 133221022213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 133221022213 = 2311 ⋅57646483.

It is a cyclic number.

It is not a de Polignac number, because 312220122331 - 2¹ = 312220122329 is a prime.

It is a super-2 number, since 2×312220122331² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312220122341) 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, 12008466231 + ... + 12008466256.

It is an arithmetic number, because the mean of its divisors is an integer number (84059263708).

Almost surely, 2^312220122331 is an apocalyptic number.

312220122331 is a deficient number, since it is larger than the sum of its proper divisors (24016932501).

312220122331 is a wasteful number, since it uses less digits than its factorization.

312220122331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24016932500.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 312220122331 its reverse (133221022213), we get a palindrome (445441144544).

The spelling of 312220122331 in words is "three hundred twelve billion, two hundred twenty million, one hundred twenty-two thousand, three hundred thirty-one".