13231321131 has 16 divisors (see below), whose sum is σ = 20213856000. Its totient is φ = 7541313888.

The previous prime is 13231321123. The next prime is 13231321163. The reversal of 13231321131 is 13112313231.

It is a happy number.

It is not a de Polignac number, because 13231321131 - 2³ = 13231321123 is a prime.

It is a super-2 number, since 2×13231321131² (a number of 21 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 = 13231321098 and 13231321107.

It is not an unprimeable number, because it can be changed into a prime (13231321121) 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, 801681 + ... + 818018.

It is an arithmetic number, because the mean of its divisors is an integer number (1263366000).

Almost surely, 2^13231321131 is an apocalyptic number.

13231321131 is a deficient number, since it is larger than the sum of its proper divisors (6982534869).

13231321131 is a wasteful number, since it uses less digits than its factorization.

13231321131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1620098.

The product of its digits is 324, while the sum is 21.

Adding to 13231321131 its reverse (13112313231), we get a palindrome (26343634362).

The spelling of 13231321131 in words is "thirteen billion, two hundred thirty-one million, three hundred twenty-one thousand, one hundred thirty-one".