21104323421303 has 16 divisors (see below), whose sum is σ = 21325781584800. Its totient is φ = 20883387772800.

The previous prime is 21104323421231. The next prime is 21104323421353. The reversal of 21104323421303 is 30312432340112.

It is a cyclic number.

It is not a de Polignac number, because 21104323421303 - 2⁸ = 21104323421047 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 (21104323421353) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 292668953 + ... + 292741053.

It is an arithmetic number, because the mean of its divisors is an integer number (1332861349050).

Almost surely, 2^{21104323421303} is an apocalyptic number.

21104323421303 is a deficient number, since it is larger than the sum of its proper divisors (221458163497).

21104323421303 is a wasteful number, since it uses less digits than its factorization.

21104323421303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75682.

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 21104323421303 its reverse (30312432340112), we get a palindrome (51416755761415).

The spelling of 21104323421303 in words is "twenty-one trillion, one hundred four billion, three hundred twenty-three million, four hundred twenty-one thousand, three hundred three".