21230313203321 has 8 divisors (see below), whose sum is σ = 21236591334600. Its totient is φ = 21224035768320.

The previous prime is 21230313203311. The next prime is 21230313203327. The reversal of 21230313203321 is 12330231303212.

It can be written as a sum of positive squares in 4 ways, for example, as 2477853774400 + 18752459428921 = 1574120^2 + 4330411^2 .

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 21230313203321 - 2³⁸ = 20955435296377 is a prime.

It is a super-2 number, since 2×21230313203321² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21230313203327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64312475 + ... + 64641743.

It is an arithmetic number, because the mean of its divisors is an integer number (2654573916825).

Almost surely, 2^{21230313203321} is an apocalyptic number.

It is an amenable number.

21230313203321 is a deficient number, since it is larger than the sum of its proper divisors (6278131279).

21230313203321 is a wasteful number, since it uses less digits than its factorization.

21230313203321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348139.

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 21230313203321 its reverse (12330231303212), we get a palindrome (33560544506533).

The spelling of 21230313203321 in words is "twenty-one trillion, two hundred thirty billion, three hundred thirteen million, two hundred three thousand, three hundred twenty-one".