2212101209 has 2 divisors, whose sum is σ = 2212101210. Its totient is φ = 2212101208.

The previous prime is 2212101187. The next prime is 2212101223. The reversal of 2212101209 is 9021012122.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2198203225 + 13897984 = 46885^2 + 3728^2 .

It is a cyclic number.

It is not a de Polignac number, because 2212101209 - 2⁸ = 2212100953 is a prime.

It is not a weakly prime, because it can be changed into another prime (2212101259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1106050604 + 1106050605.

It is an arithmetic number, because the mean of its divisors is an integer number (1106050605).

Almost surely, 2^2212101209 is an apocalyptic number.

It is an amenable number.

2212101209 is a deficient number, since it is larger than the sum of its proper divisors (1).

2212101209 is an equidigital number, since it uses as much as digits as its factorization.

2212101209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 2212101209 is about 47032.9800140285. The cubic root of 2212101209 is about 1302.9717437550.

The spelling of 2212101209 in words is "two billion, two hundred twelve million, one hundred one thousand, two hundred nine".