12240443121 has 16 divisors (see below), whose sum is σ = 16632323136. Its totient is φ = 8004499776.

The previous prime is 12240443053. The next prime is 12240443129. The reversal of 12240443121 is 12134404221.

It is not a de Polignac number, because 12240443121 - 2¹⁸ = 12240180977 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12240443091 and 12240443100.

It is not an unprimeable number, because it can be changed into a prime (12240443129) 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 15 ways as a sum of consecutive naturals, for example, 1313946 + ... + 1323228.

It is an arithmetic number, because the mean of its divisors is an integer number (1039520196).

Almost surely, 2^12240443121 is an apocalyptic number.

It is an amenable number.

12240443121 is a deficient number, since it is larger than the sum of its proper divisors (4391880015).

12240443121 is an equidigital number, since it uses as much as digits as its factorization.

12240443121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17632.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 12240443121 its reverse (12134404221), we get a palindrome (24374847342).

The spelling of 12240443121 in words is "twelve billion, two hundred forty million, four hundred forty-three thousand, one hundred twenty-one".