120195807817 has 2 divisors, whose sum is σ = 120195807818. Its totient is φ = 120195807816.

The previous prime is 120195807763. The next prime is 120195807857. The reversal of 120195807817 is 718708591021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118236948736 + 1958859081 = 343856^2 + 44259^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120195807817 is a prime.

It is not a weakly prime, because it can be changed into another prime (120195807857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60097903908 + 60097903909.

It is an arithmetic number, because the mean of its divisors is an integer number (60097903909).

Almost surely, 2^120195807817 is an apocalyptic number.

It is an amenable number.

120195807817 is a deficient number, since it is larger than the sum of its proper divisors (1).

120195807817 is an equidigital number, since it uses as much as digits as its factorization.

120195807817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 282240, while the sum is 49.

The spelling of 120195807817 in words is "one hundred twenty billion, one hundred ninety-five million, eight hundred seven thousand, eight hundred seventeen".