2121365303 has 4 divisors (see below), whose sum is σ = 2140827480. Its totient is φ = 2101903128.

The previous prime is 2121365287. The next prime is 2121365339. The reversal of 2121365303 is 3035631212.

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 2121365303 - 2⁴ = 2121365287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121365353) 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, 9730925 + ... + 9731142.

It is an arithmetic number, because the mean of its divisors is an integer number (535206870).

Almost surely, 2^2121365303 is an apocalyptic number.

2121365303 is a deficient number, since it is larger than the sum of its proper divisors (19462177).

2121365303 is a wasteful number, since it uses less digits than its factorization.

2121365303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19462176.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 2121365303 is about 46058.2815897424. The cubic root of 2121365303 is about 1284.9073707751.

Adding to 2121365303 its reverse (3035631212), we get a palindrome (5156996515).

The spelling of 2121365303 in words is "two billion, one hundred twenty-one million, three hundred sixty-five thousand, three hundred three".