21324223230021 has 48 divisors (see below), whose sum is σ = 30991885666560. Its totient is φ = 14128614864000.

The previous prime is 21324223230019. The next prime is 21324223230031. The reversal of 21324223230021 is 12003232242312.

21324223230021 is a `hidden beast` number, since 2 + 1 + 3 + 2 + 422 + 3 + 230 + 0 + 2 + 1 = 666.

It is not a de Polignac number, because 21324223230021 - 2¹ = 21324223230019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21324223230031) 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 47 ways as a sum of consecutive naturals, for example, 2827767511 + ... + 2827775051.

It is an arithmetic number, because the mean of its divisors is an integer number (645664284720).

Almost surely, 2^{21324223230021} is an apocalyptic number.

It is an amenable number.

21324223230021 is a deficient number, since it is larger than the sum of its proper divisors (9667662436539).

21324223230021 is a wasteful number, since it uses less digits than its factorization.

21324223230021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10218 (or 10215 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 21324223230021 its reverse (12003232242312), we get a palindrome (33327455472333).

The spelling of 21324223230021 in words is "twenty-one trillion, three hundred twenty-four billion, two hundred twenty-three million, two hundred thirty thousand, twenty-one".