11131222113 has 24 divisors (see below), whose sum is σ = 17545338720. Its totient is φ = 6744183360.

The previous prime is 11131222097. The next prime is 11131222129. The reversal of 11131222113 is 31122213111.

It is an interprime number because it is at equal distance from previous prime (11131222097) and next prime (11131222129).

It is not a de Polignac number, because 11131222113 - 2⁴ = 11131222097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11131222013) 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, 359245 + ... + 388997.

It is an arithmetic number, because the mean of its divisors is an integer number (731055780).

Almost surely, 2^11131222113 is an apocalyptic number.

It is an amenable number.

11131222113 is a deficient number, since it is larger than the sum of its proper divisors (6414116607).

11131222113 is a wasteful number, since it uses less digits than its factorization.

11131222113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33549 (or 33546 counting only the distinct ones).

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

Adding to 11131222113 its reverse (31122213111), we get a palindrome (42253435224).

The spelling of 11131222113 in words is "eleven billion, one hundred thirty-one million, two hundred twenty-two thousand, one hundred thirteen".