12113209 has 2 divisors, whose sum is σ = 12113210. Its totient is φ = 12113208.

The previous prime is 12113207. The next prime is 12113221. The reversal of 12113209 is 90231121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12110400 + 2809 = 3480^2 + 53^2 .

It is a cyclic number.

It is not a de Polignac number, because 12113209 - 2¹ = 12113207 is a prime.

Together with 12113207, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12113201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6056604 + 6056605.

It is an arithmetic number, because the mean of its divisors is an integer number (6056605).

Almost surely, 2^12113209 is an apocalyptic number.

It is an amenable number.

12113209 is a deficient number, since it is larger than the sum of its proper divisors (1).

12113209 is an equidigital number, since it uses as much as digits as its factorization.

12113209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 12113209 is about 3480.4035685535. The cubic root of 12113209 is about 229.6605515671.

The spelling of 12113209 in words is "twelve million, one hundred thirteen thousand, two hundred nine".