21112110203 has 8 divisors (see below), whose sum is σ = 21797968896. Its totient is φ = 20426553000.

The previous prime is 21112110181. The next prime is 21112110211. The reversal of 21112110203 is 30201121112.

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

It is a cyclic number.

It is not a de Polignac number, because 21112110203 - 2⁶ = 21112110139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21112115203) 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 7 ways as a sum of consecutive naturals, for example, 71528 + ... + 217578.

It is an arithmetic number, because the mean of its divisors is an integer number (2724746112).

Almost surely, 2^21112110203 is an apocalyptic number.

21112110203 is a deficient number, since it is larger than the sum of its proper divisors (685858693).

21112110203 is a wasteful number, since it uses less digits than its factorization.

21112110203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150745.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21112110203 its reverse (30201121112), we get a palindrome (51313231315).

The spelling of 21112110203 in words is "twenty-one billion, one hundred twelve million, one hundred ten thousand, two hundred three".