9111112217 has 2 divisors, whose sum is σ = 9111112218. Its totient is φ = 9111112216.

The previous prime is 9111112201. The next prime is 9111112223. The reversal of 9111112217 is 7122111119.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8952755161 + 158357056 = 94619^2 + 12584^2 .

It is an emirp because it is prime and its reverse (7122111119) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9111112217 - 2⁴ = 9111112201 is a prime.

It is not a weakly prime, because it can be changed into another prime (9111112267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4555556108 + 4555556109.

It is an arithmetic number, because the mean of its divisors is an integer number (4555556109).

Almost surely, 2^9111112217 is an apocalyptic number.

It is an amenable number.

9111112217 is a deficient number, since it is larger than the sum of its proper divisors (1).

9111112217 is an equidigital number, since it uses as much as digits as its factorization.

9111112217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 252, while the sum is 26.

The square root of 9111112217 is about 95452.1462147395. The cubic root of 9111112217 is about 2088.6089365232.

The spelling of 9111112217 in words is "nine billion, one hundred eleven million, one hundred twelve thousand, two hundred seventeen".