21101044404 has 48 divisors (see below), whose sum is σ = 53916065280. Its totient is φ = 6369932640.

The previous prime is 21101044403. The next prime is 21101044429. The reversal of 21101044404 is 40444010112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101044403) by changing a digit.

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, 269194 + ... + 338625.

It is an arithmetic number, because the mean of its divisors is an integer number (1123251360).

Almost surely, 2^21101044404 is an apocalyptic number.

It is an amenable number.

21101044404 is an abundant number, since it is smaller than the sum of its proper divisors (32815020876).

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

21101044404 is a wasteful number, since it uses less digits than its factorization.

21101044404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608100 (or 608098 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 21101044404 its reverse (40444010112), we get a palindrome (61545054516).

The spelling of 21101044404 in words is "twenty-one billion, one hundred one million, forty-four thousand, four hundred four".