17020321217 has 2 divisors, whose sum is σ = 17020321218. Its totient is φ = 17020321216.

The previous prime is 17020321193. The next prime is 17020321229. The reversal of 17020321217 is 71212302071.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15233483776 + 1786837441 = 123424^2 + 42271^2 .

It is a cyclic number.

It is not a de Polignac number, because 17020321217 - 2³⁰ = 15946579393 is a prime.

It is a super-2 number, since 2×17020321217² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (17020321117) 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, 8510160608 + 8510160609.

It is an arithmetic number, because the mean of its divisors is an integer number (8510160609).

Almost surely, 2^17020321217 is an apocalyptic number.

It is an amenable number.

17020321217 is a deficient number, since it is larger than the sum of its proper divisors (1).

17020321217 is an equidigital number, since it uses as much as digits as its factorization.

17020321217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1176, while the sum is 26.

Adding to 17020321217 its reverse (71212302071), we get a palindrome (88232623288).

The spelling of 17020321217 in words is "seventeen billion, twenty million, three hundred twenty-one thousand, two hundred seventeen".