21223330333 has 4 divisors (see below), whose sum is σ = 21955169340. Its totient is φ = 20491491328.

The previous prime is 21223330327. The next prime is 21223330361. The reversal of 21223330333 is 33303332212.

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

It can be written as a sum of positive squares in 2 ways, for example, as 17919035044 + 3304295289 = 133862^2 + 57483^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21223330333 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21223330298 and 21223330307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21223330313) 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, 365919460 + ... + 365919517.

It is an arithmetic number, because the mean of its divisors is an integer number (5488792335).

Almost surely, 2^21223330333 is an apocalyptic number.

It is an amenable number.

21223330333 is a deficient number, since it is larger than the sum of its proper divisors (731839007).

21223330333 is an equidigital number, since it uses as much as digits as its factorization.

21223330333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731839006.

The product of its (nonzero) digits is 5832, while the sum is 25.

Adding to 21223330333 its reverse (33303332212), we get a palindrome (54526662545).

The spelling of 21223330333 in words is "twenty-one billion, two hundred twenty-three million, three hundred thirty thousand, three hundred thirty-three".