11121120191 has 2 divisors, whose sum is σ = 11121120192. Its totient is φ = 11121120190.

The previous prime is 11121120161. The next prime is 11121120211. The reversal of 11121120191 is 19102112111.

It is an a-pointer prime, because the next prime (11121120211) can be obtained adding 11121120191 to its sum of digits (20).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11121120191 - 2²² = 11116925887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11121120161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5560560095 + 5560560096.

It is an arithmetic number, because the mean of its divisors is an integer number (5560560096).

Almost surely, 2^11121120191 is an apocalyptic number.

11121120191 is a deficient number, since it is larger than the sum of its proper divisors (1).

11121120191 is an equidigital number, since it uses as much as digits as its factorization.

11121120191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 20.

The spelling of 11121120191 in words is "eleven billion, one hundred twenty-one million, one hundred twenty thousand, one hundred ninety-one".