21330102321 has 12 divisors (see below), whose sum is σ = 33611070480. Its totient is φ = 12927334680.

The previous prime is 21330102293. The next prime is 21330102323. The reversal of 21330102321 is 12320103312.

21330102321 is a `hidden beast` number, since 2 + 1 + 330 + 10 + 2 + 321 = 666.

It is not a de Polignac number, because 21330102321 - 2⁶ = 21330102257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21330102294 and 21330102303.

It is not an unprimeable number, because it can be changed into a prime (21330102323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 107727691 + ... + 107727888.

It is an arithmetic number, because the mean of its divisors is an integer number (2800922540).

Almost surely, 2^21330102321 is an apocalyptic number.

It is an amenable number.

21330102321 is a deficient number, since it is larger than the sum of its proper divisors (12280968159).

21330102321 is a wasteful number, since it uses less digits than its factorization.

21330102321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215455596 (or 215455593 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21330102321 its reverse (12320103312), we get a palindrome (33650205633).

Subtracting from 21330102321 its reverse (12320103312), we obtain a palindrome (9009999009).

The spelling of 21330102321 in words is "twenty-one billion, three hundred thirty million, one hundred two thousand, three hundred twenty-one".