10312313021 has 4 divisors (see below), whose sum is σ = 10318079100. Its totient is φ = 10306546944.

The previous prime is 10312313017. The next prime is 10312313041. The reversal of 10312313021 is 12031321301.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4323720025 + 5988592996 = 65755^2 + 77386^2 .

It is a cyclic number.

It is not a de Polignac number, because 10312313021 - 2² = 10312313017 is a prime.

It is a super-2 number, since 2×10312313021² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10312313041) 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, 2880356 + ... + 2883933.

It is an arithmetic number, because the mean of its divisors is an integer number (2579519775).

Almost surely, 2^10312313021 is an apocalyptic number.

It is an amenable number.

10312313021 is a deficient number, since it is larger than the sum of its proper divisors (5766079).

10312313021 is an equidigital number, since it uses as much as digits as its factorization.

10312313021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5766078.

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

Adding to 10312313021 its reverse (12031321301), we get a palindrome (22343634322).

The spelling of 10312313021 in words is "ten billion, three hundred twelve million, three hundred thirteen thousand, twenty-one".