12043321040 has 40 divisors (see below), whose sum is σ = 28395111168. Its totient is φ = 4749476480.

The previous prime is 12043321039. The next prime is 12043321049. The reversal of 12043321040 is 4012334021.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12043321049) 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, 1054472 + ... + 1065831.

Almost surely, 2^12043321040 is an apocalyptic number.

12043321040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12043321040 is an abundant number, since it is smaller than the sum of its proper divisors (16351790128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12043321040 is a wasteful number, since it uses less digits than its factorization.

12043321040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2120387 (or 2120381 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 12043321040 its reverse (4012334021), we get a palindrome (16055655061).

The spelling of 12043321040 in words is "twelve billion, forty-three million, three hundred twenty-one thousand, forty".