211011222217 has 2 divisors, whose sum is σ = 211011222218. Its totient is φ = 211011222216.

The previous prime is 211011222211. The next prime is 211011222239. The reversal of 211011222217 is 712222110112.

It is an a-pointer prime, because the next prime (211011222239) can be obtained adding 211011222217 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 206069694601 + 4941527616 = 453949^2 + 70296^2 .

It is a cyclic number.

It is not a de Polignac number, because 211011222217 - 2³¹ = 208863738569 is a prime.

It is not a weakly prime, because it can be changed into another prime (211011222211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105505611108 + 105505611109.

It is an arithmetic number, because the mean of its divisors is an integer number (105505611109).

Almost surely, 2^211011222217 is an apocalyptic number.

It is an amenable number.

211011222217 is a deficient number, since it is larger than the sum of its proper divisors (1).

211011222217 is an equidigital number, since it uses as much as digits as its factorization.

211011222217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 22.

Adding to 211011222217 its reverse (712222110112), we get a palindrome (923233332329).

The spelling of 211011222217 in words is "two hundred eleven billion, eleven million, two hundred twenty-two thousand, two hundred seventeen".