21333021333 has 32 divisors (see below), whose sum is σ = 30995002752. Its totient is φ = 12972960000.

The previous prime is 21333021329. The next prime is 21333021371. The reversal of 21333021333 is 33312033312.

It is not a de Polignac number, because 21333021333 - 2² = 21333021329 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21333021733) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 2149683 + ... + 2159583.

It is an arithmetic number, because the mean of its divisors is an integer number (968593836).

Almost surely, 2^21333021333 is an apocalyptic number.

It is an amenable number.

21333021333 is a deficient number, since it is larger than the sum of its proper divisors (9661981419).

21333021333 is a wasteful number, since it uses less digits than its factorization.

21333021333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10565.

The product of its (nonzero) digits is 2916, while the sum is 24.

Adding to 21333021333 its reverse (33312033312), we get a palindrome (54645054645).

The spelling of 21333021333 in words is "twenty-one billion, three hundred thirty-three million, twenty-one thousand, three hundred thirty-three".