21333021303 has 16 divisors (see below), whose sum is σ = 31053762432. Its totient is φ = 12919140000.

The previous prime is 21333021271. The next prime is 21333021329. The reversal of 21333021303 is 30312033312.

It is not a de Polignac number, because 21333021303 - 2⁵ = 21333021271 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21333021303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21333021503) 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 15 ways as a sum of consecutive naturals, for example, 205513 + ... + 291378.

It is an arithmetic number, because the mean of its divisors is an integer number (1940860152).

Almost surely, 2^21333021303 is an apocalyptic number.

21333021303 is a deficient number, since it is larger than the sum of its proper divisors (9720741129).

21333021303 is a wasteful number, since it uses less digits than its factorization.

21333021303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498206.

The product of its (nonzero) digits is 972, while the sum is 21.

Adding to 21333021303 its reverse (30312033312), we get a palindrome (51645054615).

The spelling of 21333021303 in words is "twenty-one billion, three hundred thirty-three million, twenty-one thousand, three hundred three".