321013131021 has 32 divisors (see below), whose sum is σ = 535544893440. Its totient is φ = 188277490800.

The previous prime is 321013130983. The next prime is 321013131091. The reversal of 321013131021 is 120131310123.

321013131021 is a `hidden beast` number, since 321 + 0 + 1 + 31 + 310 + 2 + 1 = 666.

It is not a de Polignac number, because 321013131021 - 2¹⁷ = 321012999949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 321013130985 and 321013131003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321013131091) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17423895 + ... + 17442308.

It is an arithmetic number, because the mean of its divisors is an integer number (16735777920).

Almost surely, 2^321013131021 is an apocalyptic number.

321013131021 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

321013131021 is a deficient number, since it is larger than the sum of its proper divisors (214531762419).

321013131021 is a wasteful number, since it uses less digits than its factorization.

321013131021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34866254 (or 34866248 counting only the distinct ones).

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

Adding to 321013131021 its reverse (120131310123), we get a palindrome (441144441144).

The spelling of 321013131021 in words is "three hundred twenty-one billion, thirteen million, one hundred thirty-one thousand, twenty-one".