21412234424443 has 4 divisors (see below), whose sum is σ = 21412908453960. Its totient is φ = 21411560394928.

The previous prime is 21412234424417. The next prime is 21412234424513. The reversal of 21412234424443 is 34442443221412.

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

It is a cyclic number.

It is not a de Polignac number, because 21412234424443 - 2¹⁷ = 21412234293371 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21412234424396 and 21412234424405.

It is not an unprimeable number, because it can be changed into a prime (21412234424543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 336967105 + ... + 337030642.

It is an arithmetic number, because the mean of its divisors is an integer number (5353227113490).

Almost surely, 2^{21412234424443} is an apocalyptic number.

21412234424443 is a deficient number, since it is larger than the sum of its proper divisors (674029517).

21412234424443 is an equidigital number, since it uses as much as digits as its factorization.

21412234424443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674029516.

The product of its digits is 589824, while the sum is 40.

Adding to 21412234424443 its reverse (34442443221412), we get a palindrome (55854677645855).

The spelling of 21412234424443 in words is "twenty-one trillion, four hundred twelve billion, two hundred thirty-four million, four hundred twenty-four thousand, four hundred forty-three".