122816191 has 2 divisors, whose sum is σ = 122816192. Its totient is φ = 122816190.

The previous prime is 122816167. The next prime is 122816201. The reversal of 122816191 is 191618221.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 122816191 - 2⁷ = 122816063 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122816791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61408095 + 61408096.

It is an arithmetic number, because the mean of its divisors is an integer number (61408096).

Almost surely, 2^122816191 is an apocalyptic number.

122816191 is a deficient number, since it is larger than the sum of its proper divisors (1).

122816191 is an equidigital number, since it uses as much as digits as its factorization.

122816191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 31.

The square root of 122816191 is about 11082.2466585075. The cubic root of 122816191 is about 497.0711316263.

The spelling of 122816191 in words is "one hundred twenty-two million, eight hundred sixteen thousand, one hundred ninety-one".