13123231131 has 8 divisors (see below), whose sum is σ = 17503488000. Its totient is φ = 8745897512.

The previous prime is 13123231127. The next prime is 13123231139. The reversal of 13123231131 is 13113232131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13123231131 - 2² = 13123231127 is a prime.

It is a super-2 number, since 2×13123231131² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13123231098 and 13123231107.

It is not an unprimeable number, because it can be changed into a prime (13123231139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 720315 + ... + 738308.

It is an arithmetic number, because the mean of its divisors is an integer number (2187936000).

Almost surely, 2^13123231131 is an apocalyptic number.

13123231131 is a deficient number, since it is larger than the sum of its proper divisors (4380256869).

13123231131 is a wasteful number, since it uses less digits than its factorization.

13123231131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1461625.

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

Adding to 13123231131 its reverse (13113232131), we get a palindrome (26236463262).

The spelling of 13123231131 in words is "thirteen billion, one hundred twenty-three million, two hundred thirty-one thousand, one hundred thirty-one".