21132320000321 has 4 divisors (see below), whose sum is σ = 21284351079600. Its totient is φ = 20980288921044.

The previous prime is 21132320000279. The next prime is 21132320000371. The reversal of 21132320000321 is 12300002323112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21132320000321 - 2³⁰ = 21131246258497 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21132320000293 and 21132320000302.

It is not an unprimeable number, because it can be changed into a prime (21132320000371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76015539431 + ... + 76015539708.

It is an arithmetic number, because the mean of its divisors is an integer number (5321087769900).

Almost surely, 2^{21132320000321} is an apocalyptic number.

It is an amenable number.

21132320000321 is a deficient number, since it is larger than the sum of its proper divisors (152031079279).

21132320000321 is a wasteful number, since it uses less digits than its factorization.

21132320000321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152031079278.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21132320000321 its reverse (12300002323112), we get a palindrome (33432322323433).

The spelling of 21132320000321 in words is "twenty-one trillion, one hundred thirty-two billion, three hundred twenty million, three hundred twenty-one", and thus it is an aban number.