31321033321131 has 16 divisors (see below), whose sum is σ = 46401926824320. Its totient is φ = 20880510690600.

The previous prime is 31321033321099. The next prime is 31321033321163. The reversal of 31321033321131 is 13112333012313.

31321033321131 is a `hidden beast` number, since 3 + 1 + 3 + 210 + 3 + 332 + 113 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (31321033321099) and next prime (31321033321163).

It is not a de Polignac number, because 31321033321131 - 2⁵ = 31321033321099 is a prime.

It is a super-2 number, since 2×31321033321131² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 31321033321095 and 31321033321104.

It is not an unprimeable number, because it can be changed into a prime (31321033321181) 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, 1688145 + ... + 8092706.

It is an arithmetic number, because the mean of its divisors is an integer number (2900120426520).

Almost surely, 2^{31321033321131} is an apocalyptic number.

31321033321131 is a deficient number, since it is larger than the sum of its proper divisors (15080893503189).

31321033321131 is a wasteful number, since it uses less digits than its factorization.

31321033321131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9899463 (or 9899457 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 27.

Adding to 31321033321131 its reverse (13112333012313), we get a palindrome (44433366333444).

The spelling of 31321033321131 in words is "thirty-one trillion, three hundred twenty-one billion, thirty-three million, three hundred twenty-one thousand, one hundred thirty-one".