2013121303 has 4 divisors (see below), whose sum is σ = 2013224040. Its totient is φ = 2013018568.

The previous prime is 2013121289. The next prime is 2013121337. The reversal of 2013121303 is 3031213102.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2013121303 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 (2013121403) 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, 11833 + ... + 64546.

It is an arithmetic number, because the mean of its divisors is an integer number (503306010).

Almost surely, 2^2013121303 is an apocalyptic number.

2013121303 is a deficient number, since it is larger than the sum of its proper divisors (102737).

2013121303 is an equidigital number, since it uses as much as digits as its factorization.

2013121303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102736.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 2013121303 is about 44867.8203504472. The cubic root of 2013121303 is about 1262.6703472133.

Adding to 2013121303 its reverse (3031213102), we get a palindrome (5044334405).

The spelling of 2013121303 in words is "two billion, thirteen million, one hundred twenty-one thousand, three hundred three".