121765754717 has 2 divisors, whose sum is σ = 121765754718. Its totient is φ = 121765754716.

The previous prime is 121765754653. The next prime is 121765754729. The reversal of 121765754717 is 717457567121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90159670756 + 31606083961 = 300266^2 + 177781^2 .

It is a cyclic number.

It is not a de Polignac number, because 121765754717 - 2⁶ = 121765754653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121765754017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60882877358 + 60882877359.

It is an arithmetic number, because the mean of its divisors is an integer number (60882877359).

Almost surely, 2^121765754717 is an apocalyptic number.

It is an amenable number.

121765754717 is a deficient number, since it is larger than the sum of its proper divisors (1).

121765754717 is an equidigital number, since it uses as much as digits as its factorization.

121765754717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2881200, while the sum is 53.

The spelling of 121765754717 in words is "one hundred twenty-one billion, seven hundred sixty-five million, seven hundred fifty-four thousand, seven hundred seventeen".