21104003424323 has 2 divisors, whose sum is σ = 21104003424324. Its totient is φ = 21104003424322.

The previous prime is 21104003424281. The next prime is 21104003424349. The reversal of 21104003424323 is 32342430040112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21104003424323 - 2¹⁰ = 21104003423299 is a prime.

It is not a weakly prime, because it can be changed into another prime (21104003424353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10552001712161 + 10552001712162.

It is an arithmetic number, because the mean of its divisors is an integer number (10552001712162).

Almost surely, 2^{21104003424323} is an apocalyptic number.

21104003424323 is a deficient number, since it is larger than the sum of its proper divisors (1).

21104003424323 is an equidigital number, since it uses as much as digits as its factorization.

21104003424323 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 21104003424323 its reverse (32342430040112), we get a palindrome (53446433464435).

The spelling of 21104003424323 in words is "twenty-one trillion, one hundred four billion, three million, four hundred twenty-four thousand, three hundred twenty-three".