21204233134133 has 24 divisors (see below), whose sum is σ = 25149067435800. Its totient is φ = 17822660179968.

The previous prime is 21204233134127. The next prime is 21204233134153. The reversal of 21204233134133 is 33143133240212.

It can be written as a sum of positive squares in 4 ways, for example, as 10349204812324 + 10855028321809 = 3217018^2 + 3294697^2 .

It is not a de Polignac number, because 21204233134133 - 2⁴⁰ = 20104721506357 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21204233134133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21204233134153) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19946288 + ... + 20982441.

It is an arithmetic number, because the mean of its divisors is an integer number (1047877809825).

Almost surely, 2^{21204233134133} is an apocalyptic number.

It is an amenable number.

21204233134133 is a deficient number, since it is larger than the sum of its proper divisors (3944834301667).

21204233134133 is a wasteful number, since it uses less digits than its factorization.

21204233134133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40928949 (or 40928942 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 32.

Adding to 21204233134133 its reverse (33143133240212), we get a palindrome (54347366374345).

The spelling of 21204233134133 in words is "twenty-one trillion, two hundred four billion, two hundred thirty-three million, one hundred thirty-four thousand, one hundred thirty-three".