111201217 has 2 divisors, whose sum is σ = 111201218. Its totient is φ = 111201216.

The previous prime is 111201197. The next prime is 111201221. The reversal of 111201217 is 712102111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111175936 + 25281 = 10544^2 + 159^2 .

It is a cyclic number.

It is not a de Polignac number, because 111201217 - 2⁷ = 111201089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111201217.

It is not a weakly prime, because it can be changed into another prime (111201257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55600608 + 55600609.

It is an arithmetic number, because the mean of its divisors is an integer number (55600609).

Almost surely, 2^111201217 is an apocalyptic number.

It is an amenable number.

111201217 is a deficient number, since it is larger than the sum of its proper divisors (1).

111201217 is an equidigital number, since it uses as much as digits as its factorization.

111201217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28, while the sum is 16.

The square root of 111201217 is about 10545.1987653150. The cubic root of 111201217 is about 480.8797768353.

Adding to 111201217 its reverse (712102111), we get a palindrome (823303328).

The spelling of 111201217 in words is "one hundred eleven million, two hundred one thousand, two hundred seventeen".