2121321230303 has 4 divisors (see below), whose sum is σ = 2314168614888. Its totient is φ = 1928473845720.

The previous prime is 2121321230261. The next prime is 2121321230309. The reversal of 2121321230303 is 3030321231212.

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 2121321230303 - 2²⁶ = 2121254121439 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 (2121321230309) 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, 96423692276 + ... + 96423692297.

It is an arithmetic number, because the mean of its divisors is an integer number (578542153722).

Almost surely, 2^{2121321230303} is an apocalyptic number.

2121321230303 is a deficient number, since it is larger than the sum of its proper divisors (192847384585).

2121321230303 is a wasteful number, since it uses less digits than its factorization.

2121321230303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192847384584.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 2121321230303 its reverse (3030321231212), we get a palindrome (5151642461515).

Subtracting 2121321230303 from its reverse (3030321231212), we obtain a palindrome (909000000909).

The spelling of 2121321230303 in words is "two trillion, one hundred twenty-one billion, three hundred twenty-one million, two hundred thirty thousand, three hundred three".