21223043333 has 4 divisors (see below), whose sum is σ = 21513770028. Its totient is φ = 20932316640.

The previous prime is 21223043327. The next prime is 21223043383. The reversal of 21223043333 is 33334032212.

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 6484597729 + 14738445604 = 80527^2 + 121402^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21223043333 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 (21223043383) 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, 145363238 + ... + 145363383.

It is an arithmetic number, because the mean of its divisors is an integer number (5378442507).

Almost surely, 2^21223043333 is an apocalyptic number.

It is an amenable number.

21223043333 is a deficient number, since it is larger than the sum of its proper divisors (290726695).

21223043333 is an equidigital number, since it uses as much as digits as its factorization.

21223043333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290726694.

The product of its (nonzero) digits is 7776, while the sum is 26.

Adding to 21223043333 its reverse (33334032212), we get a palindrome (54557075545).

The spelling of 21223043333 in words is "twenty-one billion, two hundred twenty-three million, forty-three thousand, three hundred thirty-three".