1311228423403 has 4 divisors (see below), whose sum is σ = 1313098935408. Its totient is φ = 1309357911400.

The previous prime is 1311228423397. The next prime is 1311228423431. The reversal of 1311228423403 is 3043248221131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1311228423403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311228423473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 935254951 + ... + 935256352.

It is an arithmetic number, because the mean of its divisors is an integer number (328274733852).

Almost surely, 2^{1311228423403} is an apocalyptic number.

1311228423403 is a deficient number, since it is larger than the sum of its proper divisors (1870512005).

1311228423403 is an equidigital number, since it uses as much as digits as its factorization.

1311228423403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1870512004.

The product of its (nonzero) digits is 27648, while the sum is 34.

The spelling of 1311228423403 in words is "one trillion, three hundred eleven billion, two hundred twenty-eight million, four hundred twenty-three thousand, four hundred three".