21321101330 has 16 divisors (see below), whose sum is σ = 38379858264. Its totient is φ = 8528023680.

The previous prime is 21321101317. The next prime is 21321101357. The reversal of 21321101330 is 3310112312.

It can be written as a sum of positive squares in 4 ways, for example, as 12177343201 + 9143758129 = 110351^2 + 95623^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21321101299 and 21321101308.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241484 + ... + 317736.

Almost surely, 2^21321101330 is an apocalyptic number.

21321101330 is a deficient number, since it is larger than the sum of its proper divisors (17058756934).

21321101330 is a wasteful number, since it uses less digits than its factorization.

21321101330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104221.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21321101330 its reverse (3310112312), we get a palindrome (24631213642).

The spelling of 21321101330 in words is "twenty-one billion, three hundred twenty-one million, one hundred one thousand, three hundred thirty".