112720642217 has 2 divisors, whose sum is σ = 112720642218. Its totient is φ = 112720642216.

The previous prime is 112720642211. The next prime is 112720642231. The reversal of 112720642217 is 712246027211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75372760681 + 37347881536 = 274541^2 + 193256^2 .

It is a cyclic number.

It is not a de Polignac number, because 112720642217 - 2²⁸ = 112452206761 is a prime.

It is not a weakly prime, because it can be changed into another prime (112720642211) 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, 56360321108 + 56360321109.

It is an arithmetic number, because the mean of its divisors is an integer number (56360321109).

Almost surely, 2^112720642217 is an apocalyptic number.

It is an amenable number.

112720642217 is a deficient number, since it is larger than the sum of its proper divisors (1).

112720642217 is an equidigital number, since it uses as much as digits as its factorization.

112720642217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18816, while the sum is 35.

Adding to 112720642217 its reverse (712246027211), we get a palindrome (824966669428).

The spelling of 112720642217 in words is "one hundred twelve billion, seven hundred twenty million, six hundred forty-two thousand, two hundred seventeen".