13112323231 has 4 divisors (see below), whose sum is σ = 14985512272. Its totient is φ = 11239134192.

The previous prime is 13112323229. The next prime is 13112323249. The reversal of 13112323231 is 13232321131.

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 13112323231 - 2¹ = 13112323229 is a prime.

It is a super-2 number, since 2×13112323231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13112323031) 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, 936594510 + ... + 936594523.

It is an arithmetic number, because the mean of its divisors is an integer number (3746378068).

Almost surely, 2^13112323231 is an apocalyptic number.

13112323231 is a deficient number, since it is larger than the sum of its proper divisors (1873189041).

13112323231 is an equidigital number, since it uses as much as digits as its factorization.

13112323231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1873189040.

The product of its digits is 648, while the sum is 22.

Adding to 13112323231 its reverse (13232321131), we get a palindrome (26344644362).

The spelling of 13112323231 in words is "thirteen billion, one hundred twelve million, three hundred twenty-three thousand, two hundred thirty-one".