17180131421 has 2 divisors, whose sum is σ = 17180131422. Its totient is φ = 17180131420.

The previous prime is 17180131361. The next prime is 17180131453. The reversal of 17180131421 is 12413108171.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16060492900 + 1119638521 = 126730^2 + 33461^2 .

It is a cyclic number.

It is not a de Polignac number, because 17180131421 - 2³⁰ = 16106389597 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17180131021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8590065710 + 8590065711.

It is an arithmetic number, because the mean of its divisors is an integer number (8590065711).

Almost surely, 2^17180131421 is an apocalyptic number.

It is an amenable number.

17180131421 is a deficient number, since it is larger than the sum of its proper divisors (1).

17180131421 is an equidigital number, since it uses as much as digits as its factorization.

17180131421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 29.

Adding to 17180131421 its reverse (12413108171), we get a palindrome (29593239592).

The spelling of 17180131421 in words is "seventeen billion, one hundred eighty million, one hundred thirty-one thousand, four hundred twenty-one".