11313201231 has 20 divisors (see below), whose sum is σ = 17218841112. Its totient is φ = 7399826928.

The previous prime is 11313201227. The next prime is 11313201247. The reversal of 11313201231 is 13210231311.

11313201231 is a `hidden beast` number, since 113 + 1 + 320 + 1 + 231 = 666.

It is not a de Polignac number, because 11313201231 - 2² = 11313201227 is a prime.

It is a super-2 number, since 2×11313201231² (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 (11313201631) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1313341 + ... + 1321926.

Almost surely, 2^11313201231 is an apocalyptic number.

11313201231 is a deficient number, since it is larger than the sum of its proper divisors (5905639881).

11313201231 is an equidigital number, since it uses as much as digits as its factorization.

11313201231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2635332 (or 2635323 counting only the distinct ones).

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

Adding to 11313201231 its reverse (13210231311), we get a palindrome (24523432542).

The spelling of 11313201231 in words is "eleven billion, three hundred thirteen million, two hundred one thousand, two hundred thirty-one".