111112217 has 4 divisors (see below), whose sum is σ = 111365760. Its totient is φ = 110858676.

The previous prime is 111112207. The next prime is 111112219. The reversal of 111112217 is 712211111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 712211111 = 7079 ⋅100609.

It is a cyclic number.

It is not a de Polignac number, because 111112217 - 2¹⁰ = 111111193 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111112195 and 111112204.

It is not an unprimeable number, because it can be changed into a prime (111112219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126113 + ... + 126990.

It is an arithmetic number, because the mean of its divisors is an integer number (27841440).

Almost surely, 2^111112217 is an apocalyptic number.

It is an amenable number.

111112217 is a deficient number, since it is larger than the sum of its proper divisors (253543).

111112217 is an equidigital number, since it uses as much as digits as its factorization.

111112217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253542.

The product of its digits is 28, while the sum is 17.

The square root of 111112217 is about 10540.9779906800. The cubic root of 111112217 is about 480.7514517316.

Adding to 111112217 its reverse (712211111), we get a palindrome (823323328).

The spelling of 111112217 in words is "one hundred eleven million, one hundred twelve thousand, two hundred seventeen".