111222222217 has 2 divisors, whose sum is σ = 111222222218. Its totient is φ = 111222222216.

The previous prime is 111222222197. The next prime is 111222222227. The reversal of 111222222217 is 712222222111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86739674256 + 24482547961 = 294516^2 + 156469^2 .

It is a cyclic number.

It is not a de Polignac number, because 111222222217 - 2³⁵ = 76862483849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111222222191 and 111222222200.

It is not a weakly prime, because it can be changed into another prime (111222222227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55611111108 + 55611111109.

It is an arithmetic number, because the mean of its divisors is an integer number (55611111109).

Almost surely, 2^111222222217 is an apocalyptic number.

It is an amenable number.

111222222217 is a deficient number, since it is larger than the sum of its proper divisors (1).

111222222217 is an equidigital number, since it uses as much as digits as its factorization.

111222222217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 896, while the sum is 25.

Adding to 111222222217 its reverse (712222222111), we get a palindrome (823444444328).

The spelling of 111222222217 in words is "one hundred eleven billion, two hundred twenty-two million, two hundred twenty-two thousand, two hundred seventeen".