12432023420221 has 4 divisors (see below), whose sum is σ = 12552722676832. Its totient is φ = 12311324163612.

The previous prime is 12432023420191. The next prime is 12432023420233. The reversal of 12432023420221 is 12202432023421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12432023420221 - 2²¹ = 12432021323069 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12432023420221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12432023420021) 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, 60349628151 + ... + 60349628356.

It is an arithmetic number, because the mean of its divisors is an integer number (3138180669208).

Almost surely, 2^{12432023420221} is an apocalyptic number.

It is an amenable number.

12432023420221 is a deficient number, since it is larger than the sum of its proper divisors (120699256611).

12432023420221 is a wasteful number, since it uses less digits than its factorization.

12432023420221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120699256610.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 12432023420221 its reverse (12202432023421), we get a palindrome (24634455443642).

The spelling of 12432023420221 in words is "twelve trillion, four hundred thirty-two billion, twenty-three million, four hundred twenty thousand, two hundred twenty-one".