212122000217 has 2 divisors, whose sum is σ = 212122000218. Its totient is φ = 212122000216.

The previous prime is 212122000187. The next prime is 212122000231. The reversal of 212122000217 is 712000221212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 197588251081 + 14533749136 = 444509^2 + 120556^2 .

It is a cyclic number.

It is not a de Polignac number, because 212122000217 - 2⁸ = 212121999961 is a prime.

It is not a weakly prime, because it can be changed into another prime (212122000247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106061000108 + 106061000109.

It is an arithmetic number, because the mean of its divisors is an integer number (106061000109).

Almost surely, 2^212122000217 is an apocalyptic number.

It is an amenable number.

212122000217 is a deficient number, since it is larger than the sum of its proper divisors (1).

212122000217 is an equidigital number, since it uses as much as digits as its factorization.

212122000217 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 20.

Adding to 212122000217 its reverse (712000221212), we get a palindrome (924122221429).

The spelling of 212122000217 in words is "two hundred twelve billion, one hundred twenty-two million, two hundred seventeen", and thus it is an aban number.