12120210209 has 2 divisors, whose sum is σ = 12120210210. Its totient is φ = 12120210208.

The previous prime is 12120210199. The next prime is 12120210217. The reversal of 12120210209 is 90201202121.

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., 12113203600 + 7006609 = 110060^2 + 2647^2 .

It is an emirp because it is prime and its reverse (90201202121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12120210209 - 2²⁴ = 12103432993 is a prime.

It is not a weakly prime, because it can be changed into another prime (12120210269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060105104 + 6060105105.

It is an arithmetic number, because the mean of its divisors is an integer number (6060105105).

Almost surely, 2^12120210209 is an apocalyptic number.

It is an amenable number.

12120210209 is a deficient number, since it is larger than the sum of its proper divisors (1).

12120210209 is an equidigital number, since it uses as much as digits as its factorization.

12120210209 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 spelling of 12120210209 in words is "twelve billion, one hundred twenty million, two hundred ten thousand, two hundred nine".