111112211220217 has 2 divisors, whose sum is σ = 111112211220218. Its totient is φ = 111112211220216.

The previous prime is 111112211220209. The next prime is 111112211220239. The reversal of 111112211220217 is 712022112211111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109601133531136 + 1511077689081 = 10469056^2 + 1229259^2 .

It is a cyclic number.

It is not a de Polignac number, because 111112211220217 - 2³ = 111112211220209 is a prime.

It is a super-2 number, since 2×111112211220217² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111112211220191 and 111112211220200.

It is not a weakly prime, because it can be changed into another prime (111112211220247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55556105610108 + 55556105610109.

It is an arithmetic number, because the mean of its divisors is an integer number (55556105610109).

Almost surely, 2^{111112211220217} is an apocalyptic number.

It is an amenable number.

111112211220217 is a deficient number, since it is larger than the sum of its proper divisors (1).

111112211220217 is an equidigital number, since it uses as much as digits as its factorization.

111112211220217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 25.

Adding to 111112211220217 its reverse (712022112211111), we get a palindrome (823134323431328).

The spelling of 111112211220217 in words is "one hundred eleven trillion, one hundred twelve billion, two hundred eleven million, two hundred twenty thousand, two hundred seventeen".