212112201209 has 2 divisors, whose sum is σ = 212112201210. Its totient is φ = 212112201208.

The previous prime is 212112201163. The next prime is 212112201229. The reversal of 212112201209 is 902102211212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111716377600 + 100395823609 = 334240^2 + 316853^2 .

It is a cyclic number.

It is not a de Polignac number, because 212112201209 - 2¹⁶ = 212112135673 is a prime.

It is not a weakly prime, because it can be changed into another prime (212112201229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106056100604 + 106056100605.

It is an arithmetic number, because the mean of its divisors is an integer number (106056100605).

Almost surely, 2^212112201209 is an apocalyptic number.

It is an amenable number.

212112201209 is a deficient number, since it is larger than the sum of its proper divisors (1).

212112201209 is an equidigital number, since it uses as much as digits as its factorization.

212112201209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 212112201209 in words is "two hundred twelve billion, one hundred twelve million, two hundred one thousand, two hundred nine".