122491217 has 2 divisors, whose sum is σ = 122491218. Its totient is φ = 122491216.

The previous prime is 122491189. The next prime is 122491223. The reversal of 122491217 is 712194221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116726416 + 5764801 = 10804^2 + 2401^2 .

It is a cyclic number.

It is not a de Polignac number, because 122491217 - 2¹⁸ = 122229073 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 122491217.

It is not a weakly prime, because it can be changed into another prime (122491247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61245608 + 61245609.

It is an arithmetic number, because the mean of its divisors is an integer number (61245609).

Almost surely, 2^122491217 is an apocalyptic number.

It is an amenable number.

122491217 is a deficient number, since it is larger than the sum of its proper divisors (1).

122491217 is an equidigital number, since it uses as much as digits as its factorization.

122491217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 29.

The square root of 122491217 is about 11067.5750279815. The cubic root of 122491217 is about 496.6323244476.

The spelling of 122491217 in words is "one hundred twenty-two million, four hundred ninety-one thousand, two hundred seventeen".