21104134113 has 8 divisors (see below), whose sum is σ = 28141393248. Its totient is φ = 14068148864.

The previous prime is 21104134039. The next prime is 21104134141. The reversal of 21104134113 is 31143140112.

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 21104134113 - 2⁸ = 21104133857 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21104134113.

It is not an unprimeable number, because it can be changed into a prime (21104134153) 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, 279120 + ... + 346577.

It is an arithmetic number, because the mean of its divisors is an integer number (3517674156).

Almost surely, 2^21104134113 is an apocalyptic number.

It is an amenable number.

21104134113 is a deficient number, since it is larger than the sum of its proper divisors (7037259135).

21104134113 is a wasteful number, since it uses less digits than its factorization.

21104134113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636943.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 21104134113 its reverse (31143140112), we get a palindrome (52247274225).

The spelling of 21104134113 in words is "twenty-one billion, one hundred four million, one hundred thirty-four thousand, one hundred thirteen".