21104130103 has 4 divisors (see below), whose sum is σ = 24119005840. Its totient is φ = 18089254368.

The previous prime is 21104130097. The next prime is 21104130109. The reversal of 21104130103 is 30103140112.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (21104130097) and next prime (21104130109).

It is a cyclic number.

It is not a de Polignac number, because 21104130103 - 2⁹ = 21104129591 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 (21104130109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1507437858 + ... + 1507437871.

It is an arithmetic number, because the mean of its divisors is an integer number (6029751460).

Almost surely, 2^21104130103 is an apocalyptic number.

21104130103 is a deficient number, since it is larger than the sum of its proper divisors (3014875737).

21104130103 is an equidigital number, since it uses as much as digits as its factorization.

21104130103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3014875736.

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

Adding to 21104130103 its reverse (30103140112), we get a palindrome (51207270215).

The spelling of 21104130103 in words is "twenty-one billion, one hundred four million, one hundred thirty thousand, one hundred three".