2121330203 has 4 divisors (see below), whose sum is σ = 2121534168. Its totient is φ = 2121126240.

The previous prime is 2121330187. The next prime is 2121330229. The reversal of 2121330203 is 3020331212.

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

It is a cyclic number.

It is not a de Polignac number, because 2121330203 - 2⁴ = 2121330187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121330293) 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 3 ways as a sum of consecutive naturals, for example, 85493 + ... + 107478.

It is an arithmetic number, because the mean of its divisors is an integer number (530383542).

Almost surely, 2^2121330203 is an apocalyptic number.

2121330203 is a deficient number, since it is larger than the sum of its proper divisors (203965).

2121330203 is a wasteful number, since it uses less digits than its factorization.

2121330203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203964.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 2121330203 is about 46057.9005492000. The cubic root of 2121330203 is about 1284.9002840658.

Adding to 2121330203 its reverse (3020331212), we get a palindrome (5141661415).

The spelling of 2121330203 in words is "two billion, one hundred twenty-one million, three hundred thirty thousand, two hundred three".