12132209 has 4 divisors (see below), whose sum is σ = 12142080. Its totient is φ = 12122340.

The previous prime is 12132151. The next prime is 12132217. The reversal of 12132209 is 90223121.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 90223121 = 7691 ⋅11731.

It is a cyclic number.

It is not a de Polignac number, because 12132209 - 2⁸ = 12131953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12132259) 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, 2777 + ... + 5654.

It is an arithmetic number, because the mean of its divisors is an integer number (3035520).

Almost surely, 2^12132209 is an apocalyptic number.

It is an amenable number.

12132209 is a deficient number, since it is larger than the sum of its proper divisors (9871).

12132209 is an equidigital number, since it uses as much as digits as its factorization.

12132209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9870.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 12132209 is about 3483.1320675507. The cubic root of 12132209 is about 229.7805657600.

The spelling of 12132209 in words is "twelve million, one hundred thirty-two thousand, two hundred nine".