21021330332 has 12 divisors (see below), whose sum is σ = 38386777296. Its totient is φ = 10053679680.

The previous prime is 21021330301. The next prime is 21021330367. The reversal of 21021330332 is 23303312012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114246269 + ... + 114246452.

It is an arithmetic number, because the mean of its divisors is an integer number (3198898108).

Almost surely, 2^21021330332 is an apocalyptic number.

It is an amenable number.

21021330332 is a deficient number, since it is larger than the sum of its proper divisors (17365446964).

21021330332 is a wasteful number, since it uses less digits than its factorization.

21021330332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228492748 (or 228492746 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21021330332 its reverse (23303312012), we get a palindrome (44324642344).

The spelling of 21021330332 in words is "twenty-one billion, twenty-one million, three hundred thirty thousand, three hundred thirty-two".