21114304321 has 16 divisors (see below), whose sum is σ = 23799103488. Its totient is φ = 18558219600.

The previous prime is 21114304303. The next prime is 21114304331. The reversal of 21114304321 is 12340341112.

It is a cyclic number.

It is not a de Polignac number, because 21114304321 - 2⁹ = 21114303809 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21114304292 and 21114304301.

It is not an unprimeable number, because it can be changed into a prime (21114304331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 342186 + ... + 399148.

It is an arithmetic number, because the mean of its divisors is an integer number (1487443968).

Almost surely, 2^21114304321 is an apocalyptic number.

It is an amenable number.

21114304321 is a deficient number, since it is larger than the sum of its proper divisors (2684799167).

21114304321 is a wasteful number, since it uses less digits than its factorization.

21114304321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58092.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21114304321 its reverse (12340341112), we get a palindrome (33454645433).

The spelling of 21114304321 in words is "twenty-one billion, one hundred fourteen million, three hundred four thousand, three hundred twenty-one".