111220023217 has 2 divisors, whose sum is σ = 111220023218. Its totient is φ = 111220023216.

The previous prime is 111220023199. The next prime is 111220023259. The reversal of 111220023217 is 712320022111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111049564081 + 170459136 = 333241^2 + 13056^2 .

It is a cyclic number.

It is not a de Polignac number, because 111220023217 - 2²⁷ = 111085805489 is a prime.

It is not a weakly prime, because it can be changed into another prime (111220023017) 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, 55610011608 + 55610011609.

It is an arithmetic number, because the mean of its divisors is an integer number (55610011609).

Almost surely, 2^111220023217 is an apocalyptic number.

It is an amenable number.

111220023217 is a deficient number, since it is larger than the sum of its proper divisors (1).

111220023217 is an equidigital number, since it uses as much as digits as its factorization.

111220023217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 22.

Adding to 111220023217 its reverse (712320022111), we get a palindrome (823540045328).

The spelling of 111220023217 in words is "one hundred eleven billion, two hundred twenty million, twenty-three thousand, two hundred seventeen".