21042224003 has 4 divisors (see below), whose sum is σ = 21048051648. Its totient is φ = 21036396360.

The previous prime is 21042223973. The next prime is 21042224023. The reversal of 21042224003 is 30042224012.

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 21042224003 - 2¹² = 21042219907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21042224023) 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, 2908403 + ... + 2915628.

It is an arithmetic number, because the mean of its divisors is an integer number (5262012912).

Almost surely, 2^21042224003 is an apocalyptic number.

21042224003 is a deficient number, since it is larger than the sum of its proper divisors (5827645).

21042224003 is an equidigital number, since it uses as much as digits as its factorization.

21042224003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5827644.

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 21042224003 its reverse (30042224012), we get a palindrome (51084448015).

Subtracting 21042224003 from its reverse (30042224012), we obtain a palindrome (9000000009).

The spelling of 21042224003 in words is "twenty-one billion, forty-two million, two hundred twenty-four thousand, three".