312220113312 has 24 divisors (see below), whose sum is σ = 819577797696. Its totient is φ = 104073371072.

The previous prime is 312220113311. The next prime is 312220113343. The reversal of 312220113312 is 213311022213.

It is a tau number, because it is divible by the number of its divisors (24).

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, 1626146328 + ... + 1626146519.

It is an arithmetic number, because the mean of its divisors is an integer number (34149074904).

Almost surely, 2^312220113312 is an apocalyptic number.

312220113312 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

312220113312 is an abundant number, since it is smaller than the sum of its proper divisors (507357684384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

312220113312 is a wasteful number, since it uses less digits than its factorization.

312220113312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3252292860 (or 3252292852 counting only the distinct ones).

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

Adding to 312220113312 its reverse (213311022213), we get a palindrome (525531135525).

The spelling of 312220113312 in words is "three hundred twelve billion, two hundred twenty million, one hundred thirteen thousand, three hundred twelve".