12243240143 has 4 divisors (see below), whose sum is σ = 12474244728. Its totient is φ = 12012235560.

The previous prime is 12243240091. The next prime is 12243240157. The reversal of 12243240143 is 34104234221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34104234221 = 4447 ⋅7669043.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12243240143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12243240343) 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, 115502213 + ... + 115502318.

It is an arithmetic number, because the mean of its divisors is an integer number (3118561182).

Almost surely, 2^12243240143 is an apocalyptic number.

12243240143 is a deficient number, since it is larger than the sum of its proper divisors (231004585).

12243240143 is an equidigital number, since it uses as much as digits as its factorization.

12243240143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231004584.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 12243240143 its reverse (34104234221), we get a palindrome (46347474364).

The spelling of 12243240143 in words is "twelve billion, two hundred forty-three million, two hundred forty thousand, one hundred forty-three".