21313030321 has 8 divisors (see below), whose sum is σ = 23354843904. Its totient is φ = 19288594320.

The previous prime is 21313030241. The next prime is 21313030351. The reversal of 21313030321 is 12303031312.

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 21313030321 - 2¹¹ = 21313028273 is a prime.

It is a super-2 number, since 2×21313030321² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21313030351) 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, 4341826 + ... + 4346731.

It is an arithmetic number, because the mean of its divisors is an integer number (2919355488).

Almost surely, 2^21313030321 is an apocalyptic number.

It is an amenable number.

21313030321 is a deficient number, since it is larger than the sum of its proper divisors (2041813583).

21313030321 is a wasteful number, since it uses less digits than its factorization.

21313030321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8688791.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21313030321 its reverse (12303031312), we get a palindrome (33616061633).

Subtracting from 21313030321 its reverse (12303031312), we obtain a palindrome (9009999009).

The spelling of 21313030321 in words is "twenty-one billion, three hundred thirteen million, thirty thousand, three hundred twenty-one".