121716017 has 2 divisors, whose sum is σ = 121716018. Its totient is φ = 121716016.

The previous prime is 121715999. The next prime is 121716047. The reversal of 121716017 is 710617121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120802081 + 913936 = 10991^2 + 956^2 .

It is a cyclic number.

It is not a de Polignac number, because 121716017 - 2⁶ = 121715953 is a prime.

It is not a weakly prime, because it can be changed into another prime (121716047) 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, 60858008 + 60858009.

It is an arithmetic number, because the mean of its divisors is an integer number (60858009).

Almost surely, 2^121716017 is an apocalyptic number.

It is an amenable number.

121716017 is a deficient number, since it is larger than the sum of its proper divisors (1).

121716017 is an equidigital number, since it uses as much as digits as its factorization.

121716017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 588, while the sum is 26.

The square root of 121716017 is about 11032.4982211646. The cubic root of 121716017 is about 495.5824412940.

The spelling of 121716017 in words is "one hundred twenty-one million, seven hundred sixteen thousand, seventeen".