121165053917 has 2 divisors, whose sum is σ = 121165053918. Its totient is φ = 121165053916.

The previous prime is 121165053871. The next prime is 121165053923. The reversal of 121165053917 is 719350561121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120699961561 + 465092356 = 347419^2 + 21566^2 .

It is a cyclic number.

It is not a de Polignac number, because 121165053917 - 2⁸ = 121165053661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121165053517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60582526958 + 60582526959.

It is an arithmetic number, because the mean of its divisors is an integer number (60582526959).

Almost surely, 2^121165053917 is an apocalyptic number.

It is an amenable number.

121165053917 is a deficient number, since it is larger than the sum of its proper divisors (1).

121165053917 is an equidigital number, since it uses as much as digits as its factorization.

121165053917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56700, while the sum is 41.

The spelling of 121165053917 in words is "one hundred twenty-one billion, one hundred sixty-five million, fifty-three thousand, nine hundred seventeen".