2102210201209 has 2 divisors, whose sum is σ = 2102210201210. Its totient is φ = 2102210201208.

The previous prime is 2102210201191. The next prime is 2102210201219. The reversal of 2102210201209 is 9021020122012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1722057801984 + 380152399225 = 1312272^2 + 616565^2 .

It is a cyclic number.

It is not a de Polignac number, because 2102210201209 - 2²⁷ = 2102075983481 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2102210201209.

It is not a weakly prime, because it can be changed into another prime (2102210201219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051105100604 + 1051105100605.

It is an arithmetic number, because the mean of its divisors is an integer number (1051105100605).

Almost surely, 2^{2102210201209} is an apocalyptic number.

It is an amenable number.

2102210201209 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102210201209 is an equidigital number, since it uses as much as digits as its factorization.

2102210201209 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 2102210201209 in words is "two trillion, one hundred two billion, two hundred ten million, two hundred one thousand, two hundred nine".