21110011203 has 4 divisors (see below), whose sum is σ = 28146681608. Its totient is φ = 14073340800.

The previous prime is 21110011189. The next prime is 21110011207. The reversal of 21110011203 is 30211001112.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21110011203 - 2⁴ = 21110011187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21110011207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3518335198 + ... + 3518335203.

It is an arithmetic number, because the mean of its divisors is an integer number (7036670402).

Almost surely, 2^21110011203 is an apocalyptic number.

21110011203 is a deficient number, since it is larger than the sum of its proper divisors (7036670405).

21110011203 is an equidigital number, since it uses as much as digits as its factorization.

21110011203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7036670404.

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 21110011203 its reverse (30211001112), we get a palindrome (51321012315).

The spelling of 21110011203 in words is "twenty-one billion, one hundred ten million, eleven thousand, two hundred three".