312222220231 has 4 divisors (see below), whose sum is σ = 312267588472. Its totient is φ = 312176851992.

The previous prime is 312222220217. The next prime is 312222220309. The reversal of 312222220231 is 132022222213.

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

It is a cyclic number.

It is not a de Polignac number, because 312222220231 - 2⁵ = 312222220199 is a prime.

It is a super-2 number, since 2×312222220231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312222220631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22673796 + ... + 22687561.

It is an arithmetic number, because the mean of its divisors is an integer number (78066897118).

Almost surely, 2^312222220231 is an apocalyptic number.

312222220231 is a deficient number, since it is larger than the sum of its proper divisors (45368241).

312222220231 is an equidigital number, since it uses as much as digits as its factorization.

312222220231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45368240.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 312222220231 its reverse (132022222213), we get a palindrome (444244442444).

The spelling of 312222220231 in words is "three hundred twelve billion, two hundred twenty-two million, two hundred twenty thousand, two hundred thirty-one".