21330233133 has 16 divisors (see below), whose sum is σ = 31534416192. Its totient is φ = 12715488000.

The previous prime is 21330233021. The next prime is 21330233173. The reversal of 21330233133 is 33133203312.

It is a de Polignac number, because none of the positive numbers 2^k-21330233133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21330233173) 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, 5296108 + ... + 5300133.

It is an arithmetic number, because the mean of its divisors is an integer number (1970901012).

Almost surely, 2^21330233133 is an apocalyptic number.

It is an amenable number.

21330233133 is a deficient number, since it is larger than the sum of its proper divisors (10204183059).

21330233133 is a wasteful number, since it uses less digits than its factorization.

21330233133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10596316.

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

Adding to 21330233133 its reverse (33133203312), we get a palindrome (54463436445).

The spelling of 21330233133 in words is "twenty-one billion, three hundred thirty million, two hundred thirty-three thousand, one hundred thirty-three".