12112012243 has 4 divisors (see below), whose sum is σ = 12112295080. Its totient is φ = 12111729408.

The previous prime is 12112012223. The next prime is 12112012291. The reversal of 12112012243 is 34221021121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12112012243 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12112012243.

It is not an unprimeable number, because it can be changed into a prime (12112012223) 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, 62505 + ... + 167722.

It is an arithmetic number, because the mean of its divisors is an integer number (3028073770).

Almost surely, 2^12112012243 is an apocalyptic number.

12112012243 is a deficient number, since it is larger than the sum of its proper divisors (282837).

12112012243 is an equidigital number, since it uses as much as digits as its factorization.

12112012243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282836.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 12112012243 its reverse (34221021121), we get a palindrome (46333033364).

The spelling of 12112012243 in words is "twelve billion, one hundred twelve million, twelve thousand, two hundred forty-three".