31313000020321 has 16 divisors (see below), whose sum is σ = 31722241507200. Its totient is φ = 30905935418880.

The previous prime is 31313000020297. The next prime is 31313000020327. The reversal of 31313000020321 is 12302000031313.

It is a cyclic number.

It is not a de Polignac number, because 31313000020321 - 2⁷ = 31313000020193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31313000020327) 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, 463786956 + ... + 463854466.

It is an arithmetic number, because the mean of its divisors is an integer number (1982640094200).

Almost surely, 2^{31313000020321} is an apocalyptic number.

It is an amenable number.

31313000020321 is a deficient number, since it is larger than the sum of its proper divisors (409241486879).

31313000020321 is a wasteful number, since it uses less digits than its factorization.

31313000020321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83544.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 31313000020321 its reverse (12302000031313), we get a palindrome (43615000051634).

The spelling of 31313000020321 in words is "thirty-one trillion, three hundred thirteen billion, twenty thousand, three hundred twenty-one".