11131121113 has 24 divisors (see below), whose sum is σ = 13404648960. Its totient is φ = 9206588160.

The previous prime is 11131121021. The next prime is 11131121129. The reversal of 11131121113 is 31112113111.

It is not a de Polignac number, because 11131121113 - 2⁹ = 11131120601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11131121143) 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, 525828 + ... + 546586.

It is an arithmetic number, because the mean of its divisors is an integer number (558527040).

Almost surely, 2^11131121113 is an apocalyptic number.

It is an amenable number.

11131121113 is a deficient number, since it is larger than the sum of its proper divisors (2273527847).

11131121113 is a wasteful number, since it uses less digits than its factorization.

11131121113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21157 (or 21150 counting only the distinct ones).

The product of its digits is 18, while the sum is 16.

Adding to 11131121113 its reverse (31112113111), we get a palindrome (42243234224).

The spelling of 11131121113 in words is "eleven billion, one hundred thirty-one million, one hundred twenty-one thousand, one hundred thirteen".