171217121359 has 2 divisors, whose sum is σ = 171217121360. Its totient is φ = 171217121358.

The previous prime is 171217121333. The next prime is 171217121399. The reversal of 171217121359 is 953121712171.

It is a happy number.

It is an a-pointer prime, because the next prime (171217121399) can be obtained adding 171217121359 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 171217121359 - 2³⁷ = 33778167887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171217121399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85608560679 + 85608560680.

It is an arithmetic number, because the mean of its divisors is an integer number (85608560680).

Almost surely, 2^171217121359 is an apocalyptic number.

171217121359 is a deficient number, since it is larger than the sum of its proper divisors (1).

171217121359 is an equidigital number, since it uses as much as digits as its factorization.

171217121359 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26460, while the sum is 40.

The spelling of 171217121359 in words is "one hundred seventy-one billion, two hundred seventeen million, one hundred twenty-one thousand, three hundred fifty-nine".