21200133224 has 16 divisors (see below), whose sum is σ = 39755002500. Its totient is φ = 10598799232.

The previous prime is 21200133223. The next prime is 21200133239. The reversal of 21200133224 is 42233100212.

It can be written as a sum of positive squares in 2 ways, for example, as 20788449124 + 411684100 = 144182^2 + 20290^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21200133196 and 21200133205.

It is not an unprimeable number, because it can be changed into a prime (21200133223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85349 + ... + 222900.

Almost surely, 2^21200133224 is an apocalyptic number.

It is an amenable number.

21200133224 is a deficient number, since it is larger than the sum of its proper divisors (18554869276).

21200133224 is a wasteful number, since it uses less digits than its factorization.

21200133224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316852 (or 316848 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21200133224 its reverse (42233100212), we get a palindrome (63433233436).

The spelling of 21200133224 in words is "twenty-one billion, two hundred million, one hundred thirty-three thousand, two hundred twenty-four".