31021324131 has 64 divisors (see below), whose sum is σ = 49276846080. Its totient is φ = 16993342080.

The previous prime is 31021324121. The next prime is 31021324163. The reversal of 31021324131 is 13142312013.

It is not a de Polignac number, because 31021324131 - 2⁷ = 31021324003 is a prime.

It is a super-2 number, since 2×31021324131² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 31021324098 and 31021324107.

It is not an unprimeable number, because it can be changed into a prime (31021324121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10212945 + ... + 10215981.

It is an arithmetic number, because the mean of its divisors is an integer number (769950720).

Almost surely, 2^31021324131 is an apocalyptic number.

31021324131 is a deficient number, since it is larger than the sum of its proper divisors (18255521949).

31021324131 is a wasteful number, since it uses less digits than its factorization.

31021324131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3304.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 31021324131 its reverse (13142312013), we get a palindrome (44163636144).

The spelling of 31021324131 in words is "thirty-one billion, twenty-one million, three hundred twenty-four thousand, one hundred thirty-one".