111211113103217 has 2 divisors, whose sum is σ = 111211113103218. Its totient is φ = 111211113103216.

The previous prime is 111211113103169. The next prime is 111211113103297. The reversal of 111211113103217 is 712301311112111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73237036242496 + 37974076860721 = 8557864^2 + 6162311^2 .

It is a cyclic number.

It is not a de Polignac number, because 111211113103217 - 2⁸ = 111211113102961 is a prime.

It is not a weakly prime, because it can be changed into another prime (111211113103297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55605556551608 + 55605556551609.

It is an arithmetic number, because the mean of its divisors is an integer number (55605556551609).

Almost surely, 2^{111211113103217} is an apocalyptic number.

It is an amenable number.

111211113103217 is a deficient number, since it is larger than the sum of its proper divisors (1).

111211113103217 is an equidigital number, since it uses as much as digits as its factorization.

111211113103217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 26.

Adding to 111211113103217 its reverse (712301311112111), we get a palindrome (823512424215328).

The spelling of 111211113103217 in words is "one hundred eleven trillion, two hundred eleven billion, one hundred thirteen million, one hundred three thousand, two hundred seventeen".