111220117 has 2 divisors, whose sum is σ = 111220118. Its totient is φ = 111220116.

The previous prime is 111220097. The next prime is 111220127. The reversal of 111220117 is 711022111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100520676 + 10699441 = 10026^2 + 3271^2 .

It is a cyclic number.

It is not a de Polignac number, because 111220117 - 2⁷ = 111219989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111220117.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111220127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55610058 + 55610059.

It is an arithmetic number, because the mean of its divisors is an integer number (55610059).

Almost surely, 2^111220117 is an apocalyptic number.

It is an amenable number.

111220117 is a deficient number, since it is larger than the sum of its proper divisors (1).

111220117 is an equidigital number, since it uses as much as digits as its factorization.

111220117 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 111220117 is about 10546.0948696662. The cubic root of 111220117 is about 480.9070190819.

Adding to 111220117 its reverse (711022111), we get a palindrome (822242228).

The spelling of 111220117 in words is "one hundred eleven million, two hundred twenty thousand, one hundred seventeen".