21210232133 has 8 divisors (see below), whose sum is σ = 22330214400. Its totient is φ = 20090615328.

The previous prime is 21210232123. The next prime is 21210232151. The reversal of 21210232133 is 33123201212.

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

It is a cyclic number.

It is not a de Polignac number, because 21210232133 - 2²⁴ = 21193454917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210232123) 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 7 ways as a sum of consecutive naturals, for example, 32060 + ... + 208442.

It is an arithmetic number, because the mean of its divisors is an integer number (2791276800).

Almost surely, 2^21210232133 is an apocalyptic number.

It is an amenable number.

21210232133 is a deficient number, since it is larger than the sum of its proper divisors (1119982267).

21210232133 is a wasteful number, since it uses less digits than its factorization.

21210232133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182731.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21210232133 its reverse (33123201212), we get a palindrome (54333433345).

The spelling of 21210232133 in words is "twenty-one billion, two hundred ten million, two hundred thirty-two thousand, one hundred thirty-three".