313113021021 has 12 divisors (see below), whose sum is σ = 456752329020. Its totient is φ = 206675260800.

The previous prime is 313113020999. The next prime is 313113021049. The reversal of 313113021021 is 120120311313.

313113021021 is a `hidden beast` number, since 31 + 311 + 302 + 1 + 0 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 302159096100 + 10953924921 = 549690^2 + 104661^2 .

It is not a de Polignac number, because 313113021021 - 2⁵ = 313113020989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 313113020985 and 313113021003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313113021521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 172228476 + ... + 172230293.

It is an arithmetic number, because the mean of its divisors is an integer number (38062694085).

Almost surely, 2^313113021021 is an apocalyptic number.

It is an amenable number.

313113021021 is a deficient number, since it is larger than the sum of its proper divisors (143639307999).

313113021021 is a wasteful number, since it uses less digits than its factorization.

313113021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344458876 (or 344458873 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 313113021021 its reverse (120120311313), we get a palindrome (433233332334).

The spelling of 313113021021 in words is "three hundred thirteen billion, one hundred thirteen million, twenty-one thousand, twenty-one".