21023200321 has 8 divisors (see below), whose sum is σ = 21468680640. Its totient is φ = 20579528112.

The previous prime is 21023200291. The next prime is 21023200441. The reversal of 21023200321 is 12300232012.

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 21023200321 - 2¹⁵ = 21023167553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21023200295 and 21023200304.

It is not an unprimeable number, because it can be changed into a prime (21023200021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 428515 + ... + 475048.

It is an arithmetic number, because the mean of its divisors is an integer number (2683585080).

Almost surely, 2^21023200321 is an apocalyptic number.

It is an amenable number.

21023200321 is a deficient number, since it is larger than the sum of its proper divisors (445480319).

21023200321 is an equidigital number, since it uses as much as digits as its factorization.

21023200321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 904055.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21023200321 its reverse (12300232012), we get a palindrome (33323432333).

The spelling of 21023200321 in words is "twenty-one billion, twenty-three million, two hundred thousand, three hundred twenty-one".