21000332223 has 48 divisors (see below), whose sum is σ = 34021260000. Its totient is φ = 12393609984.

The previous prime is 21000332219. The next prime is 21000332317. The reversal of 21000332223 is 32223300012.

It is a happy number.

It is not a de Polignac number, because 21000332223 - 2² = 21000332219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21000332196 and 21000332205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000332923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 484788 + ... + 526326.

It is an arithmetic number, because the mean of its divisors is an integer number (708776250).

Almost surely, 2^21000332223 is an apocalyptic number.

21000332223 is a deficient number, since it is larger than the sum of its proper divisors (13020927777).

21000332223 is a wasteful number, since it uses less digits than its factorization.

21000332223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41736 (or 41733 counting only the distinct ones).

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

Adding to 21000332223 its reverse (32223300012), we get a palindrome (53223632235).

The spelling of 21000332223 in words is "twenty-one billion, three hundred thirty-two thousand, two hundred twenty-three".