12009203 has 4 divisors (see below), whose sum is σ = 12128208. Its totient is φ = 11890200.

The previous prime is 12009199. The next prime is 12009209. The reversal of 12009203 is 30290021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30290021 = 41 ⋅738781.

It is a cyclic number.

It is not a de Polignac number, because 12009203 - 2² = 12009199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12009209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59351 + ... + 59552.

It is an arithmetic number, because the mean of its divisors is an integer number (3032052).

Almost surely, 2^12009203 is an apocalyptic number.

12009203 is a deficient number, since it is larger than the sum of its proper divisors (119005).

12009203 is a wasteful number, since it uses less digits than its factorization.

12009203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119004.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 12009203 is about 3465.4296991859. The cubic root of 12009203 is about 229.0013602508.

Adding to 12009203 its reverse (30290021), we get a palindrome (42299224).

The spelling of 12009203 in words is "twelve million, nine thousand, two hundred three".