212010205817 has 2 divisors, whose sum is σ = 212010205818. Its totient is φ = 212010205816.

The previous prime is 212010205793. The next prime is 212010205819. The reversal of 212010205817 is 718502010212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116270088256 + 95740117561 = 340984^2 + 309419^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212010205817 is a prime.

Together with 212010205819, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212010205817.

It is not a weakly prime, because it can be changed into another prime (212010205819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106005102908 + 106005102909.

It is an arithmetic number, because the mean of its divisors is an integer number (106005102909).

Almost surely, 2^212010205817 is an apocalyptic number.

It is an amenable number.

212010205817 is a deficient number, since it is larger than the sum of its proper divisors (1).

212010205817 is an equidigital number, since it uses as much as digits as its factorization.

212010205817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2240, while the sum is 29.

The spelling of 212010205817 in words is "two hundred twelve billion, ten million, two hundred five thousand, eight hundred seventeen".