21233330321 has 8 divisors (see below), whose sum is σ = 24451905984. Its totient is φ = 18061065360.

The previous prime is 21233330311. The next prime is 21233330323. The reversal of 21233330321 is 12303333212.

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 21233330321 - 2⁶ = 21233330257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21233330323) 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, 11576690 + ... + 11578523.

It is an arithmetic number, because the mean of its divisors is an integer number (3056488248).

Almost surely, 2^21233330321 is an apocalyptic number.

It is an amenable number.

21233330321 is a deficient number, since it is larger than the sum of its proper divisors (3218575663).

21233330321 is a wasteful number, since it uses less digits than its factorization.

21233330321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23155351.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 21233330321 its reverse (12303333212), we get a palindrome (33536663533).

The spelling of 21233330321 in words is "twenty-one billion, two hundred thirty-three million, three hundred thirty thousand, three hundred twenty-one".