21184408810321 has 8 divisors (see below), whose sum is σ = 21285059731200. Its totient is φ = 21083920100880.

The previous prime is 21184408810297. The next prime is 21184408810379. The reversal of 21184408810321 is 12301880448112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21184408810321 - 2²⁹ = 21183871939409 is a prime.

It is a super-2 number, since 2×21184408810321² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21184408810391) 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 7 ways as a sum of consecutive naturals, for example, 40291041 + ... + 40813438.

It is an arithmetic number, because the mean of its divisors is an integer number (2660632466400).

Almost surely, 2^{21184408810321} is an apocalyptic number.

It is an amenable number.

21184408810321 is a deficient number, since it is larger than the sum of its proper divisors (100650920879).

21184408810321 is an equidigital number, since it uses as much as digits as its factorization.

21184408810321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81105719.

The product of its (nonzero) digits is 98304, while the sum is 43.

The spelling of 21184408810321 in words is "twenty-one trillion, one hundred eighty-four billion, four hundred eight million, eight hundred ten thousand, three hundred twenty-one".