122450021 has 2 divisors, whose sum is σ = 122450022. Its totient is φ = 122450020.

The previous prime is 122449949. The next prime is 122450033. The reversal of 122450021 is 120054221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120450625 + 1999396 = 10975^2 + 1414^2 .

It is a cyclic number.

It is not a de Polignac number, because 122450021 - 2²² = 118255717 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 (122450621) 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, 61225010 + 61225011.

It is an arithmetic number, because the mean of its divisors is an integer number (61225011).

Almost surely, 2^122450021 is an apocalyptic number.

It is an amenable number.

122450021 is a deficient number, since it is larger than the sum of its proper divisors (1).

122450021 is an equidigital number, since it uses as much as digits as its factorization.

122450021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 122450021 is about 11065.7137591752. The cubic root of 122450021 is about 496.5766427430.

The spelling of 122450021 in words is "one hundred twenty-two million, four hundred fifty thousand, twenty-one".