21302110321 has 8 divisors (see below), whose sum is σ = 22614073344. Its totient is φ = 19996691520.

The previous prime is 21302110289. The next prime is 21302110331. The reversal of 21302110321 is 12301120312.

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 21302110321 - 2⁵ = 21302110289 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21302110295 and 21302110304.

It is not an unprimeable number, because it can be changed into a prime (21302110331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1629345 + ... + 1642366.

It is an arithmetic number, because the mean of its divisors is an integer number (2826759168).

Almost surely, 2^21302110321 is an apocalyptic number.

It is an amenable number.

21302110321 is a deficient number, since it is larger than the sum of its proper divisors (1311963023).

21302110321 is a wasteful number, since it uses less digits than its factorization.

21302110321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3272111.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21302110321 its reverse (12301120312), we get a palindrome (33603230633).

Subtracting from 21302110321 its reverse (12301120312), we obtain a palindrome (9000990009).

The spelling of 21302110321 in words is "twenty-one billion, three hundred two million, one hundred ten thousand, three hundred twenty-one".