21304050321 has 8 divisors (see below), whose sum is σ = 28406196000. Its totient is φ = 14202302432.

The previous prime is 21304050203. The next prime is 21304050331. The reversal of 21304050321 is 12305040312.

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 21304050321 - 2¹⁰ = 21304049297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21304050331) 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, 63805 + ... + 216053.

It is an arithmetic number, because the mean of its divisors is an integer number (3550774500).

Almost surely, 2^21304050321 is an apocalyptic number.

It is an amenable number.

21304050321 is a deficient number, since it is larger than the sum of its proper divisors (7102145679).

21304050321 is a wasteful number, since it uses less digits than its factorization.

21304050321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198895.

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 21304050321 its reverse (12305040312), we get a palindrome (33609090633).

The spelling of 21304050321 in words is "twenty-one billion, three hundred four million, fifty thousand, three hundred twenty-one".