12189000209 has 4 divisors (see below), whose sum is σ = 12189464304. Its totient is φ = 12188536116.

The previous prime is 12189000199. The next prime is 12189000227. The reversal of 12189000209 is 90200098121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12189000209 - 2¹⁶ = 12188934673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12189000269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190127 + ... + 246020.

It is an arithmetic number, because the mean of its divisors is an integer number (3047366076).

Almost surely, 2^12189000209 is an apocalyptic number.

It is an amenable number.

12189000209 is a deficient number, since it is larger than the sum of its proper divisors (464095).

12189000209 is an equidigital number, since it uses as much as digits as its factorization.

12189000209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464094.

The product of its (nonzero) digits is 2592, while the sum is 32.

The spelling of 12189000209 in words is "twelve billion, one hundred eighty-nine million, two hundred nine", and thus it is an aban number.