21233325321 has 48 divisors (see below), whose sum is σ = 33456084480. Its totient is φ = 12898448640.

The previous prime is 21233325319. The next prime is 21233325331. The reversal of 21233325321 is 12352333212.

It is a happy number.

21233325321 is a `hidden beast` number, since 2 + 1 + 2 + 3 + 332 + 5 + 321 = 666.

It is not a de Polignac number, because 21233325321 - 2¹ = 21233325319 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21233325331) 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 47 ways as a sum of consecutive naturals, for example, 8193736 + ... + 8196326.

It is an arithmetic number, because the mean of its divisors is an integer number (697001760).

Almost surely, 2^21233325321 is an apocalyptic number.

It is an amenable number.

21233325321 is a deficient number, since it is larger than the sum of its proper divisors (12222759159).

21233325321 is a wasteful number, since it uses less digits than its factorization.

21233325321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3486 (or 3483 counting only the distinct ones).

The product of its digits is 6480, while the sum is 27.

Adding to 21233325321 its reverse (12352333212), we get a palindrome (33585658533).

The spelling of 21233325321 in words is "twenty-one billion, two hundred thirty-three million, three hundred twenty-five thousand, three hundred twenty-one".