122399161 has 2 divisors, whose sum is σ = 122399162. Its totient is φ = 122399160.

The previous prime is 122399153. The next prime is 122399177. The reversal of 122399161 is 161993221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122235136 + 164025 = 11056^2 + 405^2 .

It is a cyclic number.

It is not a de Polignac number, because 122399161 - 2³ = 122399153 is a prime.

It is a super-2 number, since 2×122399161² = 29963109227007842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (122399861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61199580 + 61199581.

It is an arithmetic number, because the mean of its divisors is an integer number (61199581).

Almost surely, 2^122399161 is an apocalyptic number.

It is an amenable number.

122399161 is a deficient number, since it is larger than the sum of its proper divisors (1).

122399161 is an equidigital number, since it uses as much as digits as its factorization.

122399161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832, while the sum is 34.

The square root of 122399161 is about 11063.4154310502. The cubic root of 122399161 is about 496.5078816671.

The spelling of 122399161 in words is "one hundred twenty-two million, three hundred ninety-nine thousand, one hundred sixty-one".