2121305203 has 8 divisors (see below), whose sum is σ = 2343744288. Its totient is φ = 1909716864.

The previous prime is 2121305177. The next prime is 2121305227. The reversal of 2121305203 is 3025031212.

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

It is not a de Polignac number, because 2121305203 - 2¹³ = 2121297011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121305803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2712276 + ... + 2713057.

It is an arithmetic number, because the mean of its divisors is an integer number (292968036).

Almost surely, 2^2121305203 is an apocalyptic number.

2121305203 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2121305203 is a deficient number, since it is larger than the sum of its proper divisors (222439085).

2121305203 is a wasteful number, since it uses less digits than its factorization.

2121305203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5425373.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 2121305203 is about 46057.6291508801. The cubic root of 2121305203 is about 1284.8952365044.

Adding to 2121305203 its reverse (3025031212), we get a palindrome (5146336415).

The spelling of 2121305203 in words is "two billion, one hundred twenty-one million, three hundred five thousand, two hundred three".