12172241787919 has 2 divisors, whose sum is σ = 12172241787920. Its totient is φ = 12172241787918.

The previous prime is 12172241787857. The next prime is 12172241787941. The reversal of 12172241787919 is 91978714227121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12172241787919 - 2¹⁵ = 12172241755151 is a prime.

It is a super-2 number, since 2×12172241787919² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12172241781919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6086120893959 + 6086120893960.

It is an arithmetic number, because the mean of its divisors is an integer number (6086120893960).

Almost surely, 2^{12172241787919} is an apocalyptic number.

12172241787919 is a deficient number, since it is larger than the sum of its proper divisors (1).

12172241787919 is an equidigital number, since it uses as much as digits as its factorization.

12172241787919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7112448, while the sum is 61.

The spelling of 12172241787919 in words is "twelve trillion, one hundred seventy-two billion, two hundred forty-one million, seven hundred eighty-seven thousand, nine hundred nineteen".