313031212220 has 12 divisors (see below), whose sum is σ = 657365545704. Its totient is φ = 125212484880.

The previous prime is 313031212201. The next prime is 313031212283. The reversal of 313031212220 is 22212130313.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 15651560611 = 313031212220 / (3 + 1 + 3 + 0 + 3 + 1 + 2 + 1 + 2 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 313031212192 and 313031212201.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 7825780286 + ... + 7825780325.

It is an arithmetic number, because the mean of its divisors is an integer number (54780462142).

Almost surely, 2^313031212220 is an apocalyptic number.

It is an amenable number.

313031212220 is an abundant number, since it is smaller than the sum of its proper divisors (344334333484).

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

313031212220 is a wasteful number, since it uses less digits than its factorization.

313031212220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15651560620 (or 15651560618 counting only the distinct ones).

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

Adding to 313031212220 its reverse (22212130313), we get a palindrome (335243342533).

The spelling of 313031212220 in words is "three hundred thirteen billion, thirty-one million, two hundred twelve thousand, two hundred twenty".