212112210217 has 2 divisors, whose sum is σ = 212112210218. Its totient is φ = 212112210216.

The previous prime is 212112210199. The next prime is 212112210227. The reversal of 212112210217 is 712012211212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 154874518681 + 57237691536 = 393541^2 + 239244^2 .

It is a cyclic number.

It is not a de Polignac number, because 212112210217 - 2²⁷ = 211977992489 is a prime.

It is not a weakly prime, because it can be changed into another prime (212112210227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106056105108 + 106056105109.

It is an arithmetic number, because the mean of its divisors is an integer number (106056105109).

Almost surely, 2^212112210217 is an apocalyptic number.

It is an amenable number.

212112210217 is a deficient number, since it is larger than the sum of its proper divisors (1).

212112210217 is an equidigital number, since it uses as much as digits as its factorization.

212112210217 is an odious number, because the sum of its binary digits is odd.

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

Adding to 212112210217 its reverse (712012211212), we get a palindrome (924124421429).

The spelling of 212112210217 in words is "two hundred twelve billion, one hundred twelve million, two hundred ten thousand, two hundred seventeen".