1202128117717 has 2 divisors, whose sum is σ = 1202128117718. Its totient is φ = 1202128117716.

The previous prime is 1202128117681. The next prime is 1202128117733. The reversal of 1202128117717 is 7177118212021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 841184299921 + 360943817796 = 917161^2 + 600786^2 .

It is a cyclic number.

It is not a de Polignac number, because 1202128117717 - 2²⁷ = 1201993899989 is a prime.

It is a super-2 number, since 2×1202128117717² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1202128117717.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1202128117517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601064058858 + 601064058859.

It is an arithmetic number, because the mean of its divisors is an integer number (601064058859).

Almost surely, 2^{1202128117717} is an apocalyptic number.

It is an amenable number.

1202128117717 is a deficient number, since it is larger than the sum of its proper divisors (1).

1202128117717 is an equidigital number, since it uses as much as digits as its factorization.

1202128117717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21952, while the sum is 40.

The spelling of 1202128117717 in words is "one trillion, two hundred two billion, one hundred twenty-eight million, one hundred seventeen thousand, seven hundred seventeen".