21223223333 has 4 divisors (see below), whose sum is σ = 22855778988. Its totient is φ = 19590667680.

The previous prime is 21223223279. The next prime is 21223223377. The reversal of 21223223333 is 33332232212.

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 14386083364 + 6837139969 = 119942^2 + 82687^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21223223333 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 (21253223333) 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, 816277808 + ... + 816277833.

It is an arithmetic number, because the mean of its divisors is an integer number (5713944747).

Almost surely, 2^21223223333 is an apocalyptic number.

It is an amenable number.

21223223333 is a deficient number, since it is larger than the sum of its proper divisors (1632555655).

21223223333 is a wasteful number, since it uses less digits than its factorization.

21223223333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1632555654.

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

Adding to 21223223333 its reverse (33332232212), we get a palindrome (54555455545).

The spelling of 21223223333 in words is "twenty-one billion, two hundred twenty-three million, two hundred twenty-three thousand, three hundred thirty-three".