12172617237019 has 2 divisors, whose sum is σ = 12172617237020. Its totient is φ = 12172617237018.

The previous prime is 12172617236809. The next prime is 12172617237041. The reversal of 12172617237019 is 91073271627121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12172617237019 - 2¹⁷ = 12172617105947 is a prime.

It is a super-2 number, since 2×12172617237019² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12172617237619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6086308618509 + 6086308618510.

It is an arithmetic number, because the mean of its divisors is an integer number (6086308618510).

Almost surely, 2^{12172617237019} is an apocalyptic number.

12172617237019 is a deficient number, since it is larger than the sum of its proper divisors (1).

12172617237019 is an equidigital number, since it uses as much as digits as its factorization.

12172617237019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 444528, while the sum is 49.

The spelling of 12172617237019 in words is "twelve trillion, one hundred seventy-two billion, six hundred seventeen million, two hundred thirty-seven thousand, nineteen".