12202121209 has 2 divisors, whose sum is σ = 12202121210. Its totient is φ = 12202121208.

The previous prime is 12202121201. The next prime is 12202121231. The reversal of 12202121209 is 90212120221.

It is an a-pointer prime, because the next prime (12202121231) can be obtained adding 12202121209 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11793960000 + 408161209 = 108600^2 + 20203^2 .

It is a cyclic number.

It is not a de Polignac number, because 12202121209 - 2³ = 12202121201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12202121209.

It is not a weakly prime, because it can be changed into another prime (12202121201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6101060604 + 6101060605.

It is an arithmetic number, because the mean of its divisors is an integer number (6101060605).

Almost surely, 2^12202121209 is an apocalyptic number.

It is an amenable number.

12202121209 is a deficient number, since it is larger than the sum of its proper divisors (1).

12202121209 is an equidigital number, since it uses as much as digits as its factorization.

12202121209 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 12202121209 in words is "twelve billion, two hundred two million, one hundred twenty-one thousand, two hundred nine".