1311302400303 has 16 divisors (see below), whose sum is σ = 2002547475200. Its totient is φ = 747676011456.

The previous prime is 1311302400283. The next prime is 1311302400311. The reversal of 1311302400303 is 3030042031131.

It is not a de Polignac number, because 1311302400303 - 2⁵ = 1311302400271 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1311302400303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311302408303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68308753 + ... + 68327946.

It is an arithmetic number, because the mean of its divisors is an integer number (125159217200).

Almost surely, 2^{1311302400303} is an apocalyptic number.

1311302400303 is a deficient number, since it is larger than the sum of its proper divisors (691245074897).

1311302400303 is a wasteful number, since it uses less digits than its factorization.

1311302400303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136637166.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 1311302400303 its reverse (3030042031131), we get a palindrome (4341344431434).

The spelling of 1311302400303 in words is "one trillion, three hundred eleven billion, three hundred two million, four hundred thousand, three hundred three".