12124120243 has 4 divisors (see below), whose sum is σ = 12515220928. Its totient is φ = 11733019560.

The previous prime is 12124120213. The next prime is 12124120259. The reversal of 12124120243 is 34202142121.

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-12124120243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12124120213) 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, 195550296 + ... + 195550357.

It is an arithmetic number, because the mean of its divisors is an integer number (3128805232).

Almost surely, 2^12124120243 is an apocalyptic number.

12124120243 is a deficient number, since it is larger than the sum of its proper divisors (391100685).

12124120243 is an equidigital number, since it uses as much as digits as its factorization.

12124120243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391100684.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 12124120243 its reverse (34202142121), we get a palindrome (46326262364).

The spelling of 12124120243 in words is "twelve billion, one hundred twenty-four million, one hundred twenty thousand, two hundred forty-three".