12240243443 has 4 divisors (see below), whose sum is σ = 12538786008. Its totient is φ = 11941700880.

The previous prime is 12240243419. The next prime is 12240243461. The reversal of 12240243443 is 34434204221.

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 12240243443 - 2¹⁴ = 12240227059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12240243473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149271221 + ... + 149271302.

It is an arithmetic number, because the mean of its divisors is an integer number (3134696502).

Almost surely, 2^12240243443 is an apocalyptic number.

12240243443 is a deficient number, since it is larger than the sum of its proper divisors (298542565).

12240243443 is an equidigital number, since it uses as much as digits as its factorization.

12240243443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298542564.

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 12240243443 its reverse (34434204221), we get a palindrome (46674447664).

The spelling of 12240243443 in words is "twelve billion, two hundred forty million, two hundred forty-three thousand, four hundred forty-three".