11131120091 has 16 divisors (see below), whose sum is σ = 13702348800. Its totient is φ = 8805427488.

The previous prime is 11131120079. The next prime is 11131120097. The reversal of 11131120091 is 19002113111.

It is a happy number.

It is not a de Polignac number, because 11131120091 - 2¹⁴ = 11131103707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11131120097) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 852470 + ... + 865428.

It is an arithmetic number, because the mean of its divisors is an integer number (856396800).

Almost surely, 2^11131120091 is an apocalyptic number.

11131120091 is a deficient number, since it is larger than the sum of its proper divisors (2571228709).

11131120091 is a wasteful number, since it uses less digits than its factorization.

11131120091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22418.

The product of its (nonzero) digits is 54, while the sum is 20.

The spelling of 11131120091 in words is "eleven billion, one hundred thirty-one million, one hundred twenty thousand, ninety-one".