21101302103 has 16 divisors (see below), whose sum is σ = 24954593280. Its totient is φ = 17458078176.

The previous prime is 21101302099. The next prime is 21101302121. The reversal of 21101302103 is 30120310112.

It is not a de Polignac number, because 21101302103 - 2² = 21101302099 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 (21101302153) 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 15 ways as a sum of consecutive naturals, for example, 792200 + ... + 818402.

It is an arithmetic number, because the mean of its divisors is an integer number (1559662080).

Almost surely, 2^21101302103 is an apocalyptic number.

21101302103 is a deficient number, since it is larger than the sum of its proper divisors (3853291177).

21101302103 is a wasteful number, since it uses less digits than its factorization.

21101302103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30206.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21101302103 its reverse (30120310112), we get a palindrome (51221612215).

The spelling of 21101302103 in words is "twenty-one billion, one hundred one million, three hundred two thousand, one hundred three".