126217744117 has 2 divisors, whose sum is σ = 126217744118. Its totient is φ = 126217744116.

The previous prime is 126217744091. The next prime is 126217744127. The reversal of 126217744117 is 711447712621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125037203236 + 1180540881 = 353606^2 + 34359^2 .

It is a cyclic number.

It is not a de Polignac number, because 126217744117 - 2³¹ = 124070260469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126217744127) 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, 63108872058 + 63108872059.

It is an arithmetic number, because the mean of its divisors is an integer number (63108872059).

Almost surely, 2^126217744117 is an apocalyptic number.

It is an amenable number.

126217744117 is a deficient number, since it is larger than the sum of its proper divisors (1).

126217744117 is an equidigital number, since it uses as much as digits as its factorization.

126217744117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 131712, while the sum is 43.

The spelling of 126217744117 in words is "one hundred twenty-six billion, two hundred seventeen million, seven hundred forty-four thousand, one hundred seventeen".