12042232443 has 8 divisors (see below), whose sum is σ = 17840344400. Its totient is φ = 8028154944.

The previous prime is 12042232439. The next prime is 12042232453. The reversal of 12042232443 is 34423224021.

It is not a de Polignac number, because 12042232443 - 2² = 12042232439 is a prime.

It is a super-2 number, since 2×12042232443² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 446008609 = 12042232443 / (1 + 2 + 0 + 4 + 2 + 2 + 3 + 2 + 4 + 4 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12042232453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223004278 + ... + 223004331.

It is an arithmetic number, because the mean of its divisors is an integer number (2230043050).

Almost surely, 2^12042232443 is an apocalyptic number.

12042232443 is a deficient number, since it is larger than the sum of its proper divisors (5798111957).

12042232443 is an equidigital number, since it uses as much as digits as its factorization.

12042232443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446008618 (or 446008612 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 12042232443 its reverse (34423224021), we get a palindrome (46465456464).

The spelling of 12042232443 in words is "twelve billion, forty-two million, two hundred thirty-two thousand, four hundred forty-three".