122991061 has 2 divisors, whose sum is σ = 122991062. Its totient is φ = 122991060.

The previous prime is 122991017. The next prime is 122991101. The reversal of 122991061 is 160199221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122788561 + 202500 = 11081^2 + 450^2 .

It is a cyclic number.

It is not a de Polignac number, because 122991061 - 2¹³ = 122982869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122991761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61495530 + 61495531.

It is an arithmetic number, because the mean of its divisors is an integer number (61495531).

Almost surely, 2^122991061 is an apocalyptic number.

It is an amenable number.

122991061 is a deficient number, since it is larger than the sum of its proper divisors (1).

122991061 is an equidigital number, since it uses as much as digits as its factorization.

122991061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 122991061 is about 11090.1334978439. The cubic root of 122991061 is about 497.3069355163.

The spelling of 122991061 in words is "one hundred twenty-two million, nine hundred ninety-one thousand, sixty-one".