12124031243 has 4 divisors (see below), whose sum is σ = 12125774448. Its totient is φ = 12122288040.

The previous prime is 12124031207. The next prime is 12124031279. The reversal of 12124031243 is 34213042121.

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

It is an interprime number because it is at equal distance from previous prime (12124031207) and next prime (12124031279).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12124031243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12124021243) 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, 861128 + ... + 875093.

It is an arithmetic number, because the mean of its divisors is an integer number (3031443612).

Almost surely, 2^12124031243 is an apocalyptic number.

12124031243 is a deficient number, since it is larger than the sum of its proper divisors (1743205).

12124031243 is an equidigital number, since it uses as much as digits as its factorization.

12124031243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1743204.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 12124031243 its reverse (34213042121), we get a palindrome (46337073364).

The spelling of 12124031243 in words is "twelve billion, one hundred twenty-four million, thirty-one thousand, two hundred forty-three".