12205004243 has 4 divisors (see below), whose sum is σ = 12237725808. Its totient is φ = 12172282680.

The previous prime is 12205004239. The next prime is 12205004267. The reversal of 12205004243 is 34240050221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12205004243 - 2² = 12205004239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12205004213) 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, 16360223 + ... + 16360968.

It is an arithmetic number, because the mean of its divisors is an integer number (3059431452).

Almost surely, 2^12205004243 is an apocalyptic number.

12205004243 is a deficient number, since it is larger than the sum of its proper divisors (32721565).

12205004243 is an equidigital number, since it uses as much as digits as its factorization.

12205004243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32721564.

The product of its (nonzero) digits is 1920, while the sum is 23.

Adding to 12205004243 its reverse (34240050221), we get a palindrome (46445054464).

The spelling of 12205004243 in words is "twelve billion, two hundred five million, four thousand, two hundred forty-three".