313211022020 has 48 divisors (see below), whose sum is σ = 725615353008. Its totient is φ = 112826480640.

The previous prime is 313211021969. The next prime is 313211022079. The reversal of 313211022020 is 20220112313.

It can be written as a sum of positive squares in 8 ways, for example, as 11924203204 + 301286818816 = 109198^2 + 548896^2 .

It is a super-2 number, since 2×313211022020² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 313211022020.

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 15 ways as a sum of consecutive naturals, for example, 14680289 + ... + 14701608.

It is an arithmetic number, because the mean of its divisors is an integer number (15116986521).

Almost surely, 2^313211022020 is an apocalyptic number.

It is an amenable number.

313211022020 is an abundant number, since it is smaller than the sum of its proper divisors (412404330988).

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

313211022020 is a wasteful number, since it uses less digits than its factorization.

313211022020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29381960 (or 29381958 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 313211022020 its reverse (20220112313), we get a palindrome (333431134333).

The spelling of 313211022020 in words is "three hundred thirteen billion, two hundred eleven million, twenty-two thousand, twenty".