21033002223 has 12 divisors (see below), whose sum is σ = 31980003640. Its totient is φ = 13284001296.

The previous prime is 21033002209. The next prime is 21033002297. The reversal of 21033002223 is 32220033012.

It is a happy number.

It is not a de Polignac number, because 21033002223 - 2⁹ = 21033001711 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21033002196 and 21033002205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21033002623) 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 11 ways as a sum of consecutive naturals, for example, 61499836 + ... + 61500177.

Almost surely, 2^21033002223 is an apocalyptic number.

21033002223 is a deficient number, since it is larger than the sum of its proper divisors (10947001417).

21033002223 is a wasteful number, since it uses less digits than its factorization.

21033002223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123000038 (or 123000035 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 21033002223 its reverse (32220033012), we get a palindrome (53253035235).

The spelling of 21033002223 in words is "twenty-one billion, thirty-three million, two thousand, two hundred twenty-three".