312313120220 has 48 divisors (see below), whose sum is σ = 665619292800. Its totient is φ = 123079594560.

The previous prime is 312313120181. The next prime is 312313120283. The reversal of 312313120220 is 22021313213.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 312313120192 and 312313120201.

It is a congruent number.

It is an unprimeable number.

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, 64610 + ... + 792969.

It is an arithmetic number, because the mean of its divisors is an integer number (13867068600).

Almost surely, 2^312313120220 is an apocalyptic number.

It is an amenable number.

312313120220 is an abundant number, since it is smaller than the sum of its proper divisors (353306172580).

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

312313120220 is a wasteful number, since it uses less digits than its factorization.

312313120220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857858 (or 857856 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 312313120220 its reverse (22021313213), we get a palindrome (334334433433).

The spelling of 312313120220 in words is "three hundred twelve billion, three hundred thirteen million, one hundred twenty thousand, two hundred twenty".