1311350311223 has 4 divisors (see below), whose sum is σ = 1311438036048. Its totient is φ = 1311262586400.

The previous prime is 1311350311177. The next prime is 1311350311231. The reversal of 1311350311223 is 3221130531131.

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 1311350311223 - 2¹⁶ = 1311350245687 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1311350311192 and 1311350311201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311350311123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43839986 + ... + 43869887.

It is an arithmetic number, because the mean of its divisors is an integer number (327859509012).

Almost surely, 2^{1311350311223} is an apocalyptic number.

1311350311223 is a deficient number, since it is larger than the sum of its proper divisors (87724825).

1311350311223 is an equidigital number, since it uses as much as digits as its factorization.

1311350311223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87724824.

The product of its (nonzero) digits is 1620, while the sum is 26.

Adding to 1311350311223 its reverse (3221130531131), we get a palindrome (4532480842354).

The spelling of 1311350311223 in words is "one trillion, three hundred eleven billion, three hundred fifty million, three hundred eleven thousand, two hundred twenty-three".