21441022223 has 4 divisors (see below), whose sum is σ = 21475002288. Its totient is φ = 21407042160.

The previous prime is 21441022193. The next prime is 21441022247. The reversal of 21441022223 is 32222014412.

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 21441022223 - 2¹⁶ = 21440956687 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 (21441022723) 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, 16989086 + ... + 16990347.

It is an arithmetic number, because the mean of its divisors is an integer number (5368750572).

Almost surely, 2^21441022223 is an apocalyptic number.

21441022223 is a deficient number, since it is larger than the sum of its proper divisors (33980065).

21441022223 is an equidigital number, since it uses as much as digits as its factorization.

21441022223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33980064.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 21441022223 its reverse (32222014412), we get a palindrome (53663036635).

The spelling of 21441022223 in words is "twenty-one billion, four hundred forty-one million, twenty-two thousand, two hundred twenty-three".