212210005817 has 2 divisors, whose sum is σ = 212210005818. Its totient is φ = 212210005816.

The previous prime is 212210005801. The next prime is 212210005859. The reversal of 212210005817 is 718500012212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 196227736576 + 15982269241 = 442976^2 + 126421^2 .

It is a cyclic number.

It is not a de Polignac number, because 212210005817 - 2⁴ = 212210005801 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212210005817.

It is not a weakly prime, because it can be changed into another prime (212210005417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106105002908 + 106105002909.

It is an arithmetic number, because the mean of its divisors is an integer number (106105002909).

Almost surely, 2^212210005817 is an apocalyptic number.

It is an amenable number.

212210005817 is a deficient number, since it is larger than the sum of its proper divisors (1).

212210005817 is an equidigital number, since it uses as much as digits as its factorization.

212210005817 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 212210005817 in words is "two hundred twelve billion, two hundred ten million, five thousand, eight hundred seventeen".