13112112131 has 4 divisors (see below), whose sum is σ = 13122381312. Its totient is φ = 13101842952.

The previous prime is 13112112127. The next prime is 13112112149. The reversal of 13112112131 is 13121121131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13112112131 - 2² = 13112112127 is a prime.

It is a super-2 number, since 2×13112112131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13112117131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5132675 + ... + 5135228.

It is an arithmetic number, because the mean of its divisors is an integer number (3280595328).

Almost surely, 2^13112112131 is an apocalyptic number.

13112112131 is a deficient number, since it is larger than the sum of its proper divisors (10269181).

13112112131 is a wasteful number, since it uses less digits than its factorization.

13112112131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10269180.

The product of its digits is 36, while the sum is 17.

Adding to 13112112131 its reverse (13121121131), we get a palindrome (26233233262).

The spelling of 13112112131 in words is "thirteen billion, one hundred twelve million, one hundred twelve thousand, one hundred thirty-one".