111111001217 has 2 divisors, whose sum is σ = 111111001218. Its totient is φ = 111111001216.

The previous prime is 111111001213. The next prime is 111111001249. The reversal of 111111001217 is 712100111111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79456898161 + 31654103056 = 281881^2 + 177916^2 .

It is a cyclic number.

It is not a de Polignac number, because 111111001217 - 2² = 111111001213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111111001195 and 111111001204.

It is not a weakly prime, because it can be changed into another prime (111111001213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55555500608 + 55555500609.

It is an arithmetic number, because the mean of its divisors is an integer number (55555500609).

Almost surely, 2^111111001217 is an apocalyptic number.

It is an amenable number.

111111001217 is a deficient number, since it is larger than the sum of its proper divisors (1).

111111001217 is an equidigital number, since it uses as much as digits as its factorization.

111111001217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14, while the sum is 17.

Adding to 111111001217 its reverse (712100111111), we get a palindrome (823211112328).

The spelling of 111111001217 in words is "one hundred eleven billion, one hundred eleven million, one thousand, two hundred seventeen".