211132217 has 2 divisors, whose sum is σ = 211132218. Its totient is φ = 211132216.

The previous prime is 211132211. The next prime is 211132219. The reversal of 211132217 is 712231112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 175801081 + 35331136 = 13259^2 + 5944^2 .

It is a cyclic number.

It is not a de Polignac number, because 211132217 - 2⁶ = 211132153 is a prime.

Together with 211132219, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (211132211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105566108 + 105566109.

It is an arithmetic number, because the mean of its divisors is an integer number (105566109).

Almost surely, 2^211132217 is an apocalyptic number.

It is an amenable number.

211132217 is a deficient number, since it is larger than the sum of its proper divisors (1).

211132217 is an equidigital number, since it uses as much as digits as its factorization.

211132217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 168, while the sum is 20.

The square root of 211132217 is about 14530.3894304317. The cubic root of 211132217 is about 595.4585049538.

Adding to 211132217 its reverse (712231112), we get a palindrome (923363329).

The spelling of 211132217 in words is "two hundred eleven million, one hundred thirty-two thousand, two hundred seventeen".