21324331000221 has 32 divisors (see below), whose sum is σ = 28665206169600. Its totient is φ = 14100047438400.

The previous prime is 21324331000171. The next prime is 21324331000253. The reversal of 21324331000221 is 12200013342312.

It is not a de Polignac number, because 21324331000221 - 2¹⁵ = 21324330967453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21324331000191 and 21324331000200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21324331400221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2421289000 + ... + 2421297806.

It is an arithmetic number, because the mean of its divisors is an integer number (895787692800).

Almost surely, 2^{21324331000221} is an apocalyptic number.

It is an amenable number.

21324331000221 is a deficient number, since it is larger than the sum of its proper divisors (7340875169379).

21324331000221 is a wasteful number, since it uses less digits than its factorization.

21324331000221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14009.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21324331000221 its reverse (12200013342312), we get a palindrome (33524344342533).

The spelling of 21324331000221 in words is "twenty-one trillion, three hundred twenty-four billion, three hundred thirty-one million, two hundred twenty-one", and thus it is an aban number.