21103030203 has 8 divisors (see below), whose sum is σ = 28218462528. Its totient is φ = 14028142344.

The previous prime is 21103030199. The next prime is 21103030279. The reversal of 21103030203 is 30203030112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21103030203 - 2² = 21103030199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21103030283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10134901 + ... + 10136982.

It is an arithmetic number, because the mean of its divisors is an integer number (3527307816).

Almost surely, 2^21103030203 is an apocalyptic number.

21103030203 is a deficient number, since it is larger than the sum of its proper divisors (7115432325).

21103030203 is a wasteful number, since it uses less digits than its factorization.

21103030203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20272233.

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 21103030203 its reverse (30203030112), we get a palindrome (51306060315).

Subtracting 21103030203 from its reverse (30203030112), we obtain a palindrome (9099999909).

The spelling of 21103030203 in words is "twenty-one billion, one hundred three million, thirty thousand, two hundred three".