220111217 has 2 divisors, whose sum is σ = 220111218. Its totient is φ = 220111216.

The previous prime is 220111211. The next prime is 220111259. The reversal of 220111217 is 712111022.

220111217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129937201 + 90174016 = 11399^2 + 9496^2 .

It is a cyclic number.

It is not a de Polignac number, because 220111217 - 2⁶ = 220111153 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220111195 and 220111204.

It is not a weakly prime, because it can be changed into another prime (220111211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110055608 + 110055609.

It is an arithmetic number, because the mean of its divisors is an integer number (110055609).

Almost surely, 2^220111217 is an apocalyptic number.

It is an amenable number.

220111217 is a deficient number, since it is larger than the sum of its proper divisors (1).

220111217 is an equidigital number, since it uses as much as digits as its factorization.

220111217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 17.

The square root of 220111217 is about 14836.1456247908. The cubic root of 220111217 is about 603.7827832062.

Adding to 220111217 its reverse (712111022), we get a palindrome (932222239).

The spelling of 220111217 in words is "two hundred twenty million, one hundred eleven thousand, two hundred seventeen".