312212320402220 has 96 divisors (see below), whose sum is σ = 781896901395456. Its totient is φ = 102388993977600.

The previous prime is 312212320402207. The next prime is 312212320402231. The reversal of 312212320402220 is 22204023212213.

It is a self number, because there is not a number n which added to its sum of digits gives 312212320402220.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 320131730 + ... + 321105510.

It is an arithmetic number, because the mean of its divisors is an integer number (8144759389536).

Almost surely, 2^{312212320402220} is an apocalyptic number.

It is an amenable number.

312212320402220 is an abundant number, since it is smaller than the sum of its proper divisors (469684580993236).

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

312212320402220 is a wasteful number, since it uses less digits than its factorization.

312212320402220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1073391 (or 1073389 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 312212320402220 its reverse (22204023212213), we get a palindrome (334416343614433).

The spelling of 312212320402220 in words is "three hundred twelve trillion, two hundred twelve billion, three hundred twenty million, four hundred two thousand, two hundred twenty".