121394058217 has 2 divisors, whose sum is σ = 121394058218. Its totient is φ = 121394058216.

The previous prime is 121394058211. The next prime is 121394058277. The reversal of 121394058217 is 712850493121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112195521936 + 9198536281 = 334956^2 + 95909^2 .

It is a cyclic number.

It is not a de Polignac number, because 121394058217 - 2³ = 121394058209 is a prime.

It is not a weakly prime, because it can be changed into another prime (121394058211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60697029108 + 60697029109.

It is an arithmetic number, because the mean of its divisors is an integer number (60697029109).

Almost surely, 2^121394058217 is an apocalyptic number.

It is an amenable number.

121394058217 is a deficient number, since it is larger than the sum of its proper divisors (1).

121394058217 is an equidigital number, since it uses as much as digits as its factorization.

121394058217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 43.

The spelling of 121394058217 in words is "one hundred twenty-one billion, three hundred ninety-four million, fifty-eight thousand, two hundred seventeen".