21204311100444 has 72 divisors (see below), whose sum is σ = 55585798348080. Its totient is φ = 7067997563904.

The previous prime is 21204311100439. The next prime is 21204311100521. The reversal of 21204311100444 is 44400111340212.

21204311100444 is a `hidden beast` number, since 2 + 1 + 204 + 3 + 1 + 1 + 10 + 0 + 444 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 in 23 ways as a sum of consecutive naturals, for example, 90271902 + ... + 90506490.

Almost surely, 2^{21204311100444} is an apocalyptic number.

It is an amenable number.

21204311100444 is an abundant number, since it is smaller than the sum of its proper divisors (34381487247636).

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

21204311100444 is a wasteful number, since it uses less digits than its factorization.

21204311100444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327601 (or 327587 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

Adding to 21204311100444 its reverse (44400111340212), we get a palindrome (65604422440656).

The spelling of 21204311100444 in words is "twenty-one trillion, two hundred four billion, three hundred eleven million, one hundred thousand, four hundred forty-four".