2313131021 has 4 divisors (see below), whose sum is σ = 2313441312. Its totient is φ = 2312820732.

The previous prime is 2313131017. The next prime is 2313131053. The reversal of 2313131021 is 1201313132.

2313131021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2313131021 - 2² = 2313131017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2313131011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143681 + ... + 158966.

It is an arithmetic number, because the mean of its divisors is an integer number (578360328).

Almost surely, 2^2313131021 is an apocalyptic number.

It is an amenable number.

2313131021 is a deficient number, since it is larger than the sum of its proper divisors (310291).

2313131021 is an equidigital number, since it uses as much as digits as its factorization.

2313131021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310290.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 2313131021 is about 48095.0207505933. The cubic root of 2313131021 is about 1322.5133894440.

Adding to 2313131021 its reverse (1201313132), we get a palindrome (3514444153).

The spelling of 2313131021 in words is "two billion, three hundred thirteen million, one hundred thirty-one thousand, twenty-one".