2121312100303 has 4 divisors (see below), whose sum is σ = 2314158654888. Its totient is φ = 1928465545720.

The previous prime is 2121312100267. The next prime is 2121312100357. The reversal of 2121312100303 is 3030012131212.

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 2121312100303 - 2²¹ = 2121310003151 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 (2121312100373) 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, 96423277276 + ... + 96423277297.

It is an arithmetic number, because the mean of its divisors is an integer number (578539663722).

Almost surely, 2^{2121312100303} is an apocalyptic number.

2121312100303 is a deficient number, since it is larger than the sum of its proper divisors (192846554585).

2121312100303 is a wasteful number, since it uses less digits than its factorization.

2121312100303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192846554584.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 2121312100303 its reverse (3030012131212), we get a palindrome (5151324231515).

The spelling of 2121312100303 in words is "two trillion, one hundred twenty-one billion, three hundred twelve million, one hundred thousand, three hundred three".