1311320203003 has 4 divisors (see below), whose sum is σ = 1311334087968. Its totient is φ = 1311306318040.

The previous prime is 1311320202989. The next prime is 1311320203013. The reversal of 1311320203003 is 3003020231131.

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 1311320203003 - 2¹⁷ = 1311320071931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311320203013) 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, 6799843 + ... + 6990028.

It is an arithmetic number, because the mean of its divisors is an integer number (327833521992).

Almost surely, 2^{1311320203003} is an apocalyptic number.

1311320203003 is a deficient number, since it is larger than the sum of its proper divisors (13884965).

1311320203003 is an equidigital number, since it uses as much as digits as its factorization.

1311320203003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13884964.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 1311320203003 its reverse (3003020231131), we get a palindrome (4314340434134).

The spelling of 1311320203003 in words is "one trillion, three hundred eleven billion, three hundred twenty million, two hundred three thousand, three".