313021321031 has 16 divisors (see below), whose sum is σ = 316715857920. Its totient is φ = 309351364800.

The previous prime is 313021321001. The next prime is 313021321061. The reversal of 313021321031 is 130123120313.

It is an interprime number because it is at equal distance from previous prime (313021321001) and next prime (313021321061).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-313021321031 is a prime.

It is a super-2 number, since 2×313021321031² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 313021320994 and 313021321012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313021321001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32122946 + ... + 32132688.

It is an arithmetic number, because the mean of its divisors is an integer number (19794741120).

Almost surely, 2^313021321031 is an apocalyptic number.

313021321031 is a deficient number, since it is larger than the sum of its proper divisors (3694536889).

313021321031 is a wasteful number, since it uses less digits than its factorization.

313021321031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10966.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 313021321031 its reverse (130123120313), we get a palindrome (443144441344).

The spelling of 313021321031 in words is "three hundred thirteen billion, twenty-one million, three hundred twenty-one thousand, thirty-one".