111211012110217 has 2 divisors, whose sum is σ = 111211012110218. Its totient is φ = 111211012110216.

The previous prime is 111211012110199. The next prime is 111211012110271. The reversal of 111211012110217 is 712011210112111.

It is a happy number.

Together with next prime (111211012110271) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84913202506896 + 26297809603321 = 9214836^2 + 5128139^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111211012110217 is a prime.

It is not a weakly prime, because it can be changed into another prime (111211012110017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55605506055108 + 55605506055109.

It is an arithmetic number, because the mean of its divisors is an integer number (55605506055109).

Almost surely, 2^{111211012110217} is an apocalyptic number.

It is an amenable number.

111211012110217 is a deficient number, since it is larger than the sum of its proper divisors (1).

111211012110217 is an equidigital number, since it uses as much as digits as its factorization.

111211012110217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56, while the sum is 22.

Adding to 111211012110217 its reverse (712011210112111), we get a palindrome (823222222222328).

The spelling of 111211012110217 in words is "one hundred eleven trillion, two hundred eleven billion, twelve million, one hundred ten thousand, two hundred seventeen".