21204233133 has 8 divisors (see below), whose sum is σ = 28273747008. Its totient is φ = 14135437344.

The previous prime is 21204233107. The next prime is 21204233147. The reversal of 21204233133 is 33133240212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21204233133 - 2⁶ = 21204233069 is a prime.

It is a super-2 number, since 2×21204233133² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21204233333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106360 + ... + 231777.

It is an arithmetic number, because the mean of its divisors is an integer number (3534218376).

Almost surely, 2^21204233133 is an apocalyptic number.

It is an amenable number.

21204233133 is a deficient number, since it is larger than the sum of its proper divisors (7069513875).

21204233133 is a wasteful number, since it uses less digits than its factorization.

21204233133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359043.

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 21204233133 its reverse (33133240212), we get a palindrome (54337473345).

The spelling of 21204233133 in words is "twenty-one billion, two hundred four million, two hundred thirty-three thousand, one hundred thirty-three".