11121102131 has 4 divisors (see below), whose sum is σ = 11201110200. Its totient is φ = 11041094064.

The previous prime is 11121102127. The next prime is 11121102191. The reversal of 11121102131 is 13120112111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11121102131 - 2² = 11121102127 is a prime.

It is a super-2 number, since 2×11121102131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11121102191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40003826 + ... + 40004103.

It is an arithmetic number, because the mean of its divisors is an integer number (2800277550).

Almost surely, 2^11121102131 is an apocalyptic number.

11121102131 is a deficient number, since it is larger than the sum of its proper divisors (80008069).

11121102131 is an equidigital number, since it uses as much as digits as its factorization.

11121102131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80008068.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 11121102131 its reverse (13120112111), we get a palindrome (24241214242).

The spelling of 11121102131 in words is "eleven billion, one hundred twenty-one million, one hundred two thousand, one hundred thirty-one".