212210201209 has 2 divisors, whose sum is σ = 212210201210. Its totient is φ = 212210201208.

The previous prime is 212210201167. The next prime is 212210201213. The reversal of 212210201209 is 902102012212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143341746025 + 68868455184 = 378605^2 + 262428^2 .

It is a cyclic number.

It is not a de Polignac number, because 212210201209 - 2¹¹ = 212210199161 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212210201209.

It is not a weakly prime, because it can be changed into another prime (212210201509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106105100604 + 106105100605.

It is an arithmetic number, because the mean of its divisors is an integer number (106105100605).

Almost surely, 2^212210201209 is an apocalyptic number.

It is an amenable number.

212210201209 is a deficient number, since it is larger than the sum of its proper divisors (1).

212210201209 is an equidigital number, since it uses as much as digits as its factorization.

212210201209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 212210201209 in words is "two hundred twelve billion, two hundred ten million, two hundred one thousand, two hundred nine".