12432110235521 has 4 divisors (see below), whose sum is σ = 12432130071252. Its totient is φ = 12432090399792.

The previous prime is 12432110235509. The next prime is 12432110235557. The reversal of 12432110235521 is 12553201123421.

12432110235521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4888100919025 + 7544009316496 = 2210905^2 + 2746636^2 .

It is a cyclic number.

It is not a de Polignac number, because 12432110235521 - 2¹⁸ = 12432109973377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12432110231521) 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, 8945990 + ... + 10241823.

It is an arithmetic number, because the mean of its divisors is an integer number (3108032517813).

Almost surely, 2^{12432110235521} is an apocalyptic number.

It is an amenable number.

12432110235521 is a deficient number, since it is larger than the sum of its proper divisors (19835731).

12432110235521 is an equidigital number, since it uses as much as digits as its factorization.

12432110235521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19835730.

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 12432110235521 its reverse (12553201123421), we get a palindrome (24985311358942).

The spelling of 12432110235521 in words is "twelve trillion, four hundred thirty-two billion, one hundred ten million, two hundred thirty-five thousand, five hundred twenty-one".