111220020217 has 2 divisors, whose sum is σ = 111220020218. Its totient is φ = 111220020216.

The previous prime is 111220020199. The next prime is 111220020229. The reversal of 111220020217 is 712020022111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66267115776 + 44952904441 = 257424^2 + 212021^2 .

It is a cyclic number.

It is not a de Polignac number, because 111220020217 - 2⁷ = 111220020089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111220020194 and 111220020203.

It is not a weakly prime, because it can be changed into another prime (111220023217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55610010108 + 55610010109.

It is an arithmetic number, because the mean of its divisors is an integer number (55610010109).

Almost surely, 2^111220020217 is an apocalyptic number.

It is an amenable number.

111220020217 is a deficient number, since it is larger than the sum of its proper divisors (1).

111220020217 is an equidigital number, since it uses as much as digits as its factorization.

111220020217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 19.

Adding to 111220020217 its reverse (712020022111), we get a palindrome (823240042328).

The spelling of 111220020217 in words is "one hundred eleven billion, two hundred twenty million, twenty thousand, two hundred seventeen".