312113211220 has 48 divisors (see below), whose sum is σ = 705369884688. Its totient is φ = 115575183360.

The previous prime is 312113211211. The next prime is 312113211229. The reversal of 312113211220 is 22112311213.

It is an interprime number because it is at equal distance from previous prime (312113211211) and next prime (312113211229).

It can be written as a sum of positive squares in 8 ways, for example, as 76643707716 + 235469503504 = 276846^2 + 485252^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312113211229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7503687 + ... + 7545166.

It is an arithmetic number, because the mean of its divisors is an integer number (14695205931).

Almost surely, 2^312113211220 is an apocalyptic number.

It is an amenable number.

312113211220 is an abundant number, since it is smaller than the sum of its proper divisors (393256673468).

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

312113211220 is a wasteful number, since it uses less digits than its factorization.

312113211220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15048940 (or 15048938 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 312113211220 its reverse (22112311213), we get a palindrome (334225522433).

The spelling of 312113211220 in words is "three hundred twelve billion, one hundred thirteen million, two hundred eleven thousand, two hundred twenty".