21110424044 has 6 divisors (see below), whose sum is σ = 36943242084.
Its totient is φ = 10555212020.
The previous prime is 21110424007. The next prime is 21110424089. The reversal of 21110424044 is 44042401112.
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 as a sum of consecutive naturals, namely, 2638803002 + ... + 2638803009.
It is an arithmetic number, because the mean of its divisors is an integer number (6157207014).
Almost surely, 221110424044 is an apocalyptic number.
It is an amenable number.
21110424044 is a deficient number, since it is larger than the sum of its proper divisors (15832818040).
21110424044 is a wasteful number, since it uses less digits than its factorization.
21110424044 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 5277606015 (or 5277606013 counting only the distinct ones).
The product of its (nonzero) digits is 1024, while the sum is 23.
Adding to 21110424044 its reverse (44042401112), we get a palindrome (65152825156).
The spelling of 21110424044 in words is "twenty-one billion, one hundred ten million, four hundred twenty-four thousand, forty-four".