21104304100000 has 144 divisors (see below), whose sum is σ = 56654238709152. Its totient is φ = 7674292000000.

The previous prime is 21104304099971. The next prime is 21104304100007. The reversal of 21104304100000 is 140340112.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (21104304100007) 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 23 ways as a sum of consecutive naturals, for example, 8492866 + ... + 10692865.

It is an arithmetic number, because the mean of its divisors is an integer number (393432213258).

Almost surely, 2^{21104304100000} is an apocalyptic number.

21104304100000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21104304100000 is an abundant number, since it is smaller than the sum of its proper divisors (35549934609152).

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

21104304100000 is an equidigital number, since it uses as much as digits as its factorization.

21104304100000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19185777 (or 19185749 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21104304100000 its reverse (140340112), we get a palindrome (21104444440112).

The spelling of 21104304100000 in words is "twenty-one trillion, one hundred four billion, three hundred four million, one hundred thousand".