12423344332421 has 4 divisors (see below), whose sum is σ = 13552739271744. Its totient is φ = 11293949393100.

The previous prime is 12423344332403. The next prime is 12423344332453.

12423344332421 is nontrivially palindromic in base 10.

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 not a de Polignac number, because 12423344332421 - 2¹⁰ = 12423344331397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12423344332481) 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 3 ways as a sum of consecutive naturals, for example, 564697469645 + ... + 564697469666.

It is an arithmetic number, because the mean of its divisors is an integer number (3388184817936).

Almost surely, 2^{12423344332421} is an apocalyptic number.

12423344332421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12423344332421 is a deficient number, since it is larger than the sum of its proper divisors (1129394939323).

12423344332421 is a wasteful number, since it uses less digits than its factorization.

12423344332421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1129394939322.

The product of its digits is 331776, while the sum is 38.

It can be divided in two parts, 1242334 and 4332421, that added together give a palindrome (5574755).

The spelling of 12423344332421 in words is "twelve trillion, four hundred twenty-three billion, three hundred forty-four million, three hundred thirty-two thousand, four hundred twenty-one".