312133112220 has 48 divisors (see below), whose sum is σ = 897593604768. Its totient is φ = 80985888000.

The previous prime is 312133112197. The next prime is 312133112227. The reversal of 312133112220 is 22211331213.

It is a super-2 number, since 2×312133112220² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312133112227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70298031 + ... + 70302470.

It is an arithmetic number, because the mean of its divisors is an integer number (18699866766).

Almost surely, 2^312133112220 is an apocalyptic number.

312133112220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

312133112220 is an abundant number, since it is smaller than the sum of its proper divisors (585460492548).

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

312133112220 is a wasteful number, since it uses less digits than its factorization.

312133112220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140600550 (or 140600548 counting only the distinct ones).

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

Adding to 312133112220 its reverse (22211331213), we get a palindrome (334344443433).

The spelling of 312133112220 in words is "three hundred twelve billion, one hundred thirty-three million, one hundred twelve thousand, two hundred twenty".