313023111021 has 6 divisors (see below), whose sum is σ = 452144493710. Its totient is φ = 208682074008.

The previous prime is 313023110987. The next prime is 313023111029. The reversal of 313023111021 is 120111320313.

313023111021 is a `hidden beast` number, since 31 + 302 + 311 + 1 + 0 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 275042558025 + 37980552996 = 524445^2 + 194886^2 .

It is not a de Polignac number, because 313023111021 - 2⁷ = 313023110893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 313023110985 and 313023111003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313023111029) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17390172826 + ... + 17390172843.

Almost surely, 2^313023111021 is an apocalyptic number.

It is an amenable number.

313023111021 is a deficient number, since it is larger than the sum of its proper divisors (139121382689).

313023111021 is a wasteful number, since it uses less digits than its factorization.

313023111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34780345675 (or 34780345672 counting only the distinct ones).

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

Adding to 313023111021 its reverse (120111320313), we get a palindrome (433134431334).

The spelling of 313023111021 in words is "three hundred thirteen billion, twenty-three million, one hundred eleven thousand, twenty-one".