11113131213 has 24 divisors (see below), whose sum is σ = 16562257920. Its totient is φ = 7176929760.

The previous prime is 11113131199. The next prime is 11113131299. The reversal of 11113131213 is 31213131111.

It is not a de Polignac number, because 11113131213 - 2⁵ = 11113131181 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11113131313) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 109773 + ... + 185138.

It is an arithmetic number, because the mean of its divisors is an integer number (690094080).

Almost surely, 2^11113131213 is an apocalyptic number.

It is an amenable number.

11113131213 is a deficient number, since it is larger than the sum of its proper divisors (5449126707).

11113131213 is a wasteful number, since it uses less digits than its factorization.

11113131213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295049 (or 295046 counting only the distinct ones).

The product of its digits is 54, while the sum is 18.

Adding to 11113131213 its reverse (31213131111), we get a palindrome (42326262324).

The spelling of 11113131213 in words is "eleven billion, one hundred thirteen million, one hundred thirty-one thousand, two hundred thirteen".