12172442213647 has 2 divisors, whose sum is σ = 12172442213648. Its totient is φ = 12172442213646.

The previous prime is 12172442213629. The next prime is 12172442213759. The reversal of 12172442213647 is 74631224427121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12172442213647 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12172442213597 and 12172442213606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12172442213627) 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, 6086221106823 + 6086221106824.

It is an arithmetic number, because the mean of its divisors is an integer number (6086221106824).

Almost surely, 2^{12172442213647} is an apocalyptic number.

12172442213647 is a deficient number, since it is larger than the sum of its proper divisors (1).

12172442213647 is an equidigital number, since it uses as much as digits as its factorization.

12172442213647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 903168, while the sum is 46.

The spelling of 12172442213647 in words is "twelve trillion, one hundred seventy-two billion, four hundred forty-two million, two hundred thirteen thousand, six hundred forty-seven".