121122111191 has 2 divisors, whose sum is σ = 121122111192. Its totient is φ = 121122111190.

The previous prime is 121122111157. The next prime is 121122111193. The reversal of 121122111191 is 191111221121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121122111191 - 2¹⁰ = 121122110167 is a prime.

It is a Sophie Germain prime.

Together with 121122111193, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121122111193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60561055595 + 60561055596.

It is an arithmetic number, because the mean of its divisors is an integer number (60561055596).

Almost surely, 2^121122111191 is an apocalyptic number.

121122111191 is a deficient number, since it is larger than the sum of its proper divisors (1).

121122111191 is an equidigital number, since it uses as much as digits as its factorization.

121122111191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72, while the sum is 23.

The spelling of 121122111191 in words is "one hundred twenty-one billion, one hundred twenty-two million, one hundred eleven thousand, one hundred ninety-one".