171212275660117 has 2 divisors, whose sum is σ = 171212275660118. Its totient is φ = 171212275660116.

The previous prime is 171212275660033. The next prime is 171212275660189. The reversal of 171212275660117 is 711066572212171.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156935901088836 + 14276374571281 = 12527406^2 + 3778409^2 .

It is a cyclic number.

It is not a de Polignac number, because 171212275660117 - 2²³ = 171212267271509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171212275660817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85606137830058 + 85606137830059.

It is an arithmetic number, because the mean of its divisors is an integer number (85606137830059).

Almost surely, 2^{171212275660117} is an apocalyptic number.

It is an amenable number.

171212275660117 is a deficient number, since it is larger than the sum of its proper divisors (1).

171212275660117 is an equidigital number, since it uses as much as digits as its factorization.

171212275660117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 493920, while the sum is 49.

The spelling of 171212275660117 in words is "one hundred seventy-one trillion, two hundred twelve billion, two hundred seventy-five million, six hundred sixty thousand, one hundred seventeen".