21100000103 has 24 divisors (see below), whose sum is σ = 26442687600. Its totient is φ = 16688367360.

The previous prime is 21100000069. The next prime is 21100000123. The reversal of 21100000103 is 30100000112.

It is not a de Polignac number, because 21100000103 - 2⁸ = 21099999847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100000123) 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 23 ways as a sum of consecutive naturals, for example, 2607023 + ... + 2615103.

It is an arithmetic number, because the mean of its divisors is an integer number (1101778650).

Almost surely, 2^21100000103 is an apocalyptic number.

21100000103 is a deficient number, since it is larger than the sum of its proper divisors (5342687497).

21100000103 is a wasteful number, since it uses less digits than its factorization.

21100000103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12207 (or 12200 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 8.

Adding to 21100000103 its reverse (30100000112), we get a palindrome (51200000215).

Subtracting 21100000103 from its reverse (30100000112), we obtain a palindrome (9000000009).

The spelling of 21100000103 in words is "twenty-one billion, one hundred million, one hundred three", and thus it is an aban number.