21044323224221 has 8 divisors (see below), whose sum is σ = 23280787793088. Its totient is φ = 18861749368000.

The previous prime is 21044323224203. The next prime is 21044323224247. The reversal of 21044323224221 is 12242232344012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21044323224221 - 2¹⁰ = 21044323223197 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 (21044323224271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13472677340 + ... + 13472678901.

It is an arithmetic number, because the mean of its divisors is an integer number (2910098474136).

Almost surely, 2^{21044323224221} is an apocalyptic number.

It is an amenable number.

21044323224221 is a deficient number, since it is larger than the sum of its proper divisors (2236464568867).

21044323224221 is a wasteful number, since it uses less digits than its factorization.

21044323224221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26945356323.

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 21044323224221 its reverse (12242232344012), we get a palindrome (33286555568233).

The spelling of 21044323224221 in words is "twenty-one trillion, forty-four billion, three hundred twenty-three million, two hundred twenty-four thousand, two hundred twenty-one".