212022020209 has 2 divisors, whose sum is σ = 212022020210. Its totient is φ = 212022020208.

The previous prime is 212022020201. The next prime is 212022020269. The reversal of 212022020209 is 902020220212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 198973984225 + 13048035984 = 446065^2 + 114228^2 .

It is a cyclic number.

It is not a de Polignac number, because 212022020209 - 2³ = 212022020201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212022020209.

It is not a weakly prime, because it can be changed into another prime (212022020201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106011010104 + 106011010105.

It is an arithmetic number, because the mean of its divisors is an integer number (106011010105).

Almost surely, 2^212022020209 is an apocalyptic number.

It is an amenable number.

212022020209 is a deficient number, since it is larger than the sum of its proper divisors (1).

212022020209 is an equidigital number, since it uses as much as digits as its factorization.

212022020209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

The spelling of 212022020209 in words is "two hundred twelve billion, twenty-two million, twenty thousand, two hundred nine".