13112112031 has 4 divisors (see below), whose sum is σ = 13113748312. Its totient is φ = 13110475752.

The previous prime is 13112112023. The next prime is 13112112037. The reversal of 13112112031 is 13021121131.

It is a happy number.

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 13112112031 - 2³ = 13112112023 is a prime.

It is a super-2 number, since 2×13112112031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13112111996 and 13112112014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13112112037) 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, 806061 + ... + 822166.

It is an arithmetic number, because the mean of its divisors is an integer number (3278437078).

Almost surely, 2^13112112031 is an apocalyptic number.

13112112031 is a deficient number, since it is larger than the sum of its proper divisors (1636281).

13112112031 is an equidigital number, since it uses as much as digits as its factorization.

13112112031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1636280.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 13112112031 its reverse (13021121131), we get a palindrome (26133233162).

The spelling of 13112112031 in words is "thirteen billion, one hundred twelve million, one hundred twelve thousand, thirty-one".