11121011131 has 4 divisors (see below), whose sum is σ = 11156541832. Its totient is φ = 11085480432.

The previous prime is 11121011123. The next prime is 11121011137. The reversal of 11121011131 is 13111012111.

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 11121011131 - 2³ = 11121011123 is a prime.

It is a super-2 number, since 2×11121011131² (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 (11121011137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17764881 + ... + 17765506.

It is an arithmetic number, because the mean of its divisors is an integer number (2789135458).

Almost surely, 2^11121011131 is an apocalyptic number.

11121011131 is a deficient number, since it is larger than the sum of its proper divisors (35530701).

11121011131 is an equidigital number, since it uses as much as digits as its factorization.

11121011131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35530700.

The product of its (nonzero) digits is 6, while the sum is 13.

Adding to 11121011131 its reverse (13111012111), we get a palindrome (24232023242).

The spelling of 11121011131 in words is "eleven billion, one hundred twenty-one million, eleven thousand, one hundred thirty-one".