21104443211 has 8 divisors (see below), whose sum is σ = 22220276880. Its totient is φ = 19989116928.

The previous prime is 21104443207. The next prime is 21104443231. The reversal of 21104443211 is 11234440112.

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 21104443211 - 2² = 21104443207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21104443231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39926 + ... + 209291.

It is an arithmetic number, because the mean of its divisors is an integer number (2777534610).

Almost surely, 2^21104443211 is an apocalyptic number.

21104443211 is a deficient number, since it is larger than the sum of its proper divisors (1115833669).

21104443211 is a wasteful number, since it uses less digits than its factorization.

21104443211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253693.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 21104443211 its reverse (11234440112), we get a palindrome (32338883323).

The spelling of 21104443211 in words is "twenty-one billion, one hundred four million, four hundred forty-three thousand, two hundred eleven".