11122012191 has 4 divisors (see below), whose sum is σ = 14829349592. Its totient is φ = 7414674792.

The previous prime is 11122012177. The next prime is 11122012193. The reversal of 11122012191 is 19121022111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19121022111 = 3 ⋅6373674037.

It is not a de Polignac number, because 11122012191 - 2⁷ = 11122012063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11122012193) 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, 1853668696 + ... + 1853668701.

It is an arithmetic number, because the mean of its divisors is an integer number (3707337398).

Almost surely, 2^11122012191 is an apocalyptic number.

11122012191 is a deficient number, since it is larger than the sum of its proper divisors (3707337401).

11122012191 is an equidigital number, since it uses as much as digits as its factorization.

11122012191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3707337400.

The product of its (nonzero) digits is 72, while the sum is 21.

The spelling of 11122012191 in words is "eleven billion, one hundred twenty-two million, twelve thousand, one hundred ninety-one".