21104001133 has 8 divisors (see below), whose sum is σ = 22421773080. Its totient is φ = 19825565760.

The previous prime is 21104001067. The next prime is 21104001137. The reversal of 21104001133 is 33110040112.

It can be written as a sum of positive squares in 4 ways, for example, as 13133618404 + 7970382729 = 114602^2 + 89277^2 .

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 21104001133 - 2³³ = 12514066541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21104001137) 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 7 ways as a sum of consecutive naturals, for example, 9833038 + ... + 9835183.

It is an arithmetic number, because the mean of its divisors is an integer number (2802721635).

Almost surely, 2^21104001133 is an apocalyptic number.

It is an amenable number.

21104001133 is a deficient number, since it is larger than the sum of its proper divisors (1317771947).

21104001133 is a wasteful number, since it uses less digits than its factorization.

21104001133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19668287.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21104001133 its reverse (33110040112), we get a palindrome (54214041245).

The spelling of 21104001133 in words is "twenty-one billion, one hundred four million, one thousand, one hundred thirty-three".