21104134112 has 12 divisors (see below), whose sum is σ = 41548764096. Its totient is φ = 10552067040.

The previous prime is 21104134039. The next prime is 21104134141. The reversal of 21104134112 is 21143140112.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 329752064 + ... + 329752127.

It is an arithmetic number, because the mean of its divisors is an integer number (3462397008).

Almost surely, 2^21104134112 is an apocalyptic number.

It is an amenable number.

21104134112 is a deficient number, since it is larger than the sum of its proper divisors (20444629984).

21104134112 is an equidigital number, since it uses as much as digits as its factorization.

21104134112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659504201 (or 659504193 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 21104134112 its reverse (21143140112), we get a palindrome (42247274224).

The spelling of 21104134112 in words is "twenty-one billion, one hundred four million, one hundred thirty-four thousand, one hundred twelve".