111012120217 has 2 divisors, whose sum is σ = 111012120218. Its totient is φ = 111012120216.

The previous prime is 111012120187. The next prime is 111012120221. The reversal of 111012120217 is 712021210111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95197548681 + 15814571536 = 308541^2 + 125756^2 .

It is a cyclic number.

It is not a de Polignac number, because 111012120217 - 2¹¹ = 111012118169 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111012120194 and 111012120203.

It is not a weakly prime, because it can be changed into another prime (111012120227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55506060108 + 55506060109.

It is an arithmetic number, because the mean of its divisors is an integer number (55506060109).

Almost surely, 2^111012120217 is an apocalyptic number.

It is an amenable number.

111012120217 is a deficient number, since it is larger than the sum of its proper divisors (1).

111012120217 is an equidigital number, since it uses as much as digits as its factorization.

111012120217 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 19.

Adding to 111012120217 its reverse (712021210111), we get a palindrome (823033330328).

The spelling of 111012120217 in words is "one hundred eleven billion, twelve million, one hundred twenty thousand, two hundred seventeen".