11112122191 has 2 divisors, whose sum is σ = 11112122192. Its totient is φ = 11112122190.

The previous prime is 11112122171. The next prime is 11112122207. The reversal of 11112122191 is 19122121111.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (19122121111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11112122191 - 2⁵ = 11112122159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11112122101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5556061095 + 5556061096.

It is an arithmetic number, because the mean of its divisors is an integer number (5556061096).

Almost surely, 2^11112122191 is an apocalyptic number.

11112122191 is a deficient number, since it is larger than the sum of its proper divisors (1).

11112122191 is an equidigital number, since it uses as much as digits as its factorization.

11112122191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72, while the sum is 22.

The spelling of 11112122191 in words is "eleven billion, one hundred twelve million, one hundred twenty-two thousand, one hundred ninety-one".