21333333133 has 64 divisors (see below), whose sum is σ = 28256256000. Its totient is φ = 15660739584.

The previous prime is 21333333113. The next prime is 21333333143. The reversal of 21333333133 is 33133333312.

It is not a de Polignac number, because 21333333133 - 2¹⁷ = 21333202061 is a prime.

It is a super-2 number, since 2×21333333133² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21333333113) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14621158 + ... + 14622616.

It is an arithmetic number, because the mean of its divisors is an integer number (441504000).

Almost surely, 2^21333333133 is an apocalyptic number.

It is an amenable number.

21333333133 is a deficient number, since it is larger than the sum of its proper divisors (6922922867).

21333333133 is a wasteful number, since it uses less digits than its factorization.

21333333133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1754.

The product of its digits is 13122, while the sum is 28.

Adding to 21333333133 its reverse (33133333312), we get a palindrome (54466666445).

The spelling of 21333333133 in words is "twenty-one billion, three hundred thirty-three million, three hundred thirty-three thousand, one hundred thirty-three".