21104104210 has 32 divisors (see below), whose sum is σ = 44062139520. Its totient is φ = 7127695872.

The previous prime is 21104104183. The next prime is 21104104247. The reversal of 21104104210 is 1240140112.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2245215 + ... + 2254594.

It is an arithmetic number, because the mean of its divisors is an integer number (1376941860).

Almost surely, 2^21104104210 is an apocalyptic number.

21104104210 is an abundant number, since it is smaller than the sum of its proper divisors (22958035310).

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

21104104210 is a wasteful number, since it uses less digits than its factorization.

21104104210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4499890.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21104104210 its reverse (1240140112), we get a palindrome (22344244322).

The spelling of 21104104210 in words is "twenty-one billion, one hundred four million, one hundred four thousand, two hundred ten".