21103332103 has 12 divisors (see below), whose sum is σ = 25395285240. Its totient is φ = 17464825392.

The previous prime is 21103332083. The next prime is 21103332137. The reversal of 21103332103 is 30123330112.

It is a de Polignac number, because none of the positive numbers 2^k-21103332103 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 (21103332193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7424101 + ... + 7426942.

It is an arithmetic number, because the mean of its divisors is an integer number (2116273770).

Almost surely, 2^21103332103 is an apocalyptic number.

21103332103 is a deficient number, since it is larger than the sum of its proper divisors (4291953137).

21103332103 is a wasteful number, since it uses less digits than its factorization.

21103332103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14851086 (or 14851079 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21103332103 its reverse (30123330112), we get a palindrome (51226662215).

The spelling of 21103332103 in words is "twenty-one billion, one hundred three million, three hundred thirty-two thousand, one hundred three".