12123243203 has 4 divisors (see below), whose sum is σ = 12210460920. Its totient is φ = 12036025488.

The previous prime is 12123243173. The next prime is 12123243239. The reversal of 12123243203 is 30234232121.

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 12123243203 - 2⁸ = 12123242947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12123240203) 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, 43608650 + ... + 43608927.

It is an arithmetic number, because the mean of its divisors is an integer number (3052615230).

Almost surely, 2^12123243203 is an apocalyptic number.

12123243203 is a deficient number, since it is larger than the sum of its proper divisors (87217717).

12123243203 is an equidigital number, since it uses as much as digits as its factorization.

12123243203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87217716.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 12123243203 its reverse (30234232121), we get a palindrome (42357475324).

The spelling of 12123243203 in words is "twelve billion, one hundred twenty-three million, two hundred forty-three thousand, two hundred three".