122918161 has 2 divisors, whose sum is σ = 122918162. Its totient is φ = 122918160.

The previous prime is 122918119. The next prime is 122918189. The reversal of 122918161 is 161819221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122788561 + 129600 = 11081^2 + 360^2 .

It is a cyclic number.

It is not a de Polignac number, because 122918161 - 2⁹ = 122917649 is a prime.

It is not a weakly prime, because it can be changed into another prime (122918461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61459080 + 61459081.

It is an arithmetic number, because the mean of its divisors is an integer number (61459081).

Almost surely, 2^122918161 is an apocalyptic number.

It is an amenable number.

122918161 is a deficient number, since it is larger than the sum of its proper divisors (1).

122918161 is an equidigital number, since it uses as much as digits as its factorization.

122918161 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 122918161 is about 11086.8463054198. The cubic root of 122918161 is about 497.2086605130.

The spelling of 122918161 in words is "one hundred twenty-two million, nine hundred eighteen thousand, one hundred sixty-one".