313223113021 has 48 divisors (see below), whose sum is σ = 400063197744. Its totient is φ = 242984641536.

The previous prime is 313223113013. The next prime is 313223113031. The reversal of 313223113021 is 120311322313.

It can be written as a sum of positive squares in 8 ways, for example, as 79967921796 + 233255191225 = 282786^2 + 482965^2 .

It is not a de Polignac number, because 313223113021 - 2³ = 313223113013 is a prime.

It is a super-2 number, since 2×313223113021² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 313223112983 and 313223113001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313223113031) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 80788135 + ... + 80792011.

It is an arithmetic number, because the mean of its divisors is an integer number (8334649953).

Almost surely, 2^313223113021 is an apocalyptic number.

It is an amenable number.

313223113021 is a deficient number, since it is larger than the sum of its proper divisors (86840084723).

313223113021 is a wasteful number, since it uses less digits than its factorization.

313223113021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6350 (or 6343 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 313223113021 its reverse (120311322313), we get a palindrome (433534435334).

The spelling of 313223113021 in words is "three hundred thirteen billion, two hundred twenty-three million, one hundred thirteen thousand, twenty-one".