312222112013 has 24 divisors (see below), whose sum is σ = 384601529592. Its totient is φ = 251850568704.

The previous prime is 312222111931. The next prime is 312222112021. The reversal of 312222112013 is 310211222213.

It can be written as a sum of positive squares in 4 ways, for example, as 171924671044 + 140297440969 = 414638^2 + 374563^2 .

It is not a de Polignac number, because 312222112013 - 2²² = 312217917709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312222112613) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14947745 + ... + 14968617.

It is an arithmetic number, because the mean of its divisors is an integer number (16025063733).

Almost surely, 2^312222112013 is an apocalyptic number.

It is an amenable number.

312222112013 is a deficient number, since it is larger than the sum of its proper divisors (72379417579).

312222112013 is a wasteful number, since it uses less digits than its factorization.

312222112013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38861 (or 38854 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 312222112013 its reverse (310211222213), we get a palindrome (622433334226).

The spelling of 312222112013 in words is "three hundred twelve billion, two hundred twenty-two million, one hundred twelve thousand, thirteen".