11231212113 has 64 divisors (see below), whose sum is σ = 19205683200. Its totient is φ = 6415174080.

The previous prime is 11231212099. The next prime is 11231212127. The reversal of 11231212113 is 31121213211.

It is an interprime number because it is at equal distance from previous prime (11231212099) and next prime (11231212127).

It is not a de Polignac number, because 11231212113 - 2⁵ = 11231212081 is a prime.

It is a super-2 number, since 2×11231212113² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11231212193) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1106620 + ... + 1116722.

It is an arithmetic number, because the mean of its divisors is an integer number (300088800).

Almost surely, 2^11231212113 is an apocalyptic number.

It is an amenable number.

11231212113 is a deficient number, since it is larger than the sum of its proper divisors (7974471087).

11231212113 is a wasteful number, since it uses less digits than its factorization.

11231212113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10339 (or 10333 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

Adding to 11231212113 its reverse (31121213211), we get a palindrome (42352425324).

The spelling of 11231212113 in words is "eleven billion, two hundred thirty-one million, two hundred twelve thousand, one hundred thirteen".