31011321321 has 12 divisors (see below), whose sum is σ = 44802005248. Its totient is φ = 20670579864.

The previous prime is 31011321281. The next prime is 31011321329. The reversal of 31011321321 is 12312311013.

31011321321 is a `hidden beast` number, since 3 + 10 + 11 + 321 + 321 = 666.

It is not a de Polignac number, because 31011321321 - 2⁷ = 31011321193 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31011321294 and 31011321303.

It is not an unprimeable number, because it can be changed into a prime (31011321329) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 248305 + ... + 351678.

Almost surely, 2^31011321321 is an apocalyptic number.

It is an amenable number.

31011321321 is a deficient number, since it is larger than the sum of its proper divisors (13790683927).

31011321321 is a wasteful number, since it uses less digits than its factorization.

31011321321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605732 (or 605729 counting only the distinct ones).

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

Adding to 31011321321 its reverse (12312311013), we get a palindrome (43323632334).

The spelling of 31011321321 in words is "thirty-one billion, eleven million, three hundred twenty-one thousand, three hundred twenty-one".