2121312303 has 24 divisors (see below), whose sum is σ = 3377149776. Its totient is φ = 1272384000.

The previous prime is 2121312289. The next prime is 2121312307. The reversal of 2121312303 is 3032131212.

It is not a de Polignac number, because 2121312303 - 2²⁰ = 2120263727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121312307) 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 23 ways as a sum of consecutive naturals, for example, 100848 + ... + 120053.

It is an arithmetic number, because the mean of its divisors is an integer number (140714574).

Almost surely, 2^2121312303 is an apocalyptic number.

2121312303 is a deficient number, since it is larger than the sum of its proper divisors (1255837473).

2121312303 is a wasteful number, since it uses less digits than its factorization.

2121312303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221015 (or 221012 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 2121312303 is about 46057.7062281656. The cubic root of 2121312303 is about 1284.8966700159.

Adding to 2121312303 its reverse (3032131212), we get a palindrome (5153443515).

The spelling of 2121312303 in words is "two billion, one hundred twenty-one million, three hundred twelve thousand, three hundred three".