21321303212184 has 64 divisors (see below), whose sum is σ = 54108341667840. Its totient is φ = 6999793891200.

The previous prime is 21321303212123. The next prime is 21321303212189. The reversal of 21321303212184 is 48121230312312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21321303212189) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8004297 + ... + 10330119.

It is an arithmetic number, because the mean of its divisors is an integer number (845442838560).

Almost surely, 2^{21321303212184} is an apocalyptic number.

21321303212184 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21321303212184 is an abundant number, since it is smaller than the sum of its proper divisors (32787038455656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21321303212184 is a wasteful number, since it uses less digits than its factorization.

21321303212184 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2331600 (or 2331596 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

Adding to 21321303212184 its reverse (48121230312312), we get a palindrome (69442533524496).

The spelling of 21321303212184 in words is "twenty-one trillion, three hundred twenty-one billion, three hundred three million, two hundred twelve thousand, one hundred eighty-four".