11320113231 has 96 divisors (see below), whose sum is σ = 20022266880. Its totient is φ = 6299741952.

The previous prime is 11320113223. The next prime is 11320113239. The reversal of 11320113231 is 13231102311.

11320113231 is a `hidden beast` number, since 1 + 1 + 320 + 113 + 231 = 666.

It is an interprime number because it is at equal distance from previous prime (11320113223) and next prime (11320113239).

It is not a de Polignac number, because 11320113231 - 2³ = 11320113223 is a prime.

It is a super-2 number, since 2×11320113231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11320113239) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 19089271 + ... + 19089863.

It is an arithmetic number, because the mean of its divisors is an integer number (208565280).

Almost surely, 2^11320113231 is an apocalyptic number.

11320113231 is a deficient number, since it is larger than the sum of its proper divisors (8702153649).

11320113231 is a wasteful number, since it uses less digits than its factorization.

11320113231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970 (or 957 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 11320113231 its reverse (13231102311), we get a palindrome (24551215542).

The spelling of 11320113231 in words is "eleven billion, three hundred twenty million, one hundred thirteen thousand, two hundred thirty-one".