21321133313333 has 24 divisors (see below), whose sum is σ = 25955209274112. Its totient is φ = 17153374258944.

The previous prime is 21321133313323. The next prime is 21321133313393. The reversal of 21321133313333 is 33331333112312.

It is not a de Polignac number, because 21321133313333 - 2⁴ = 21321133313317 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21321133313333.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21321133313323) 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 23 ways as a sum of consecutive naturals, for example, 13616366 + ... + 15101247.

It is an arithmetic number, because the mean of its divisors is an integer number (1081467053088).

Almost surely, 2^{21321133313333} is an apocalyptic number.

It is an amenable number.

21321133313333 is a deficient number, since it is larger than the sum of its proper divisors (4634075960779).

21321133313333 is a wasteful number, since it uses less digits than its factorization.

21321133313333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28718021 (or 28718004 counting only the distinct ones).

The product of its digits is 26244, while the sum is 32.

Adding to 21321133313333 its reverse (33331333112312), we get a palindrome (54652466425645).

The spelling of 21321133313333 in words is "twenty-one trillion, three hundred twenty-one billion, one hundred thirty-three million, three hundred thirteen thousand, three hundred thirty-three".