1311320111311 has 8 divisors (see below), whose sum is σ = 1506497900544. Its totient is φ = 1118103908280.

The previous prime is 1311320111243. The next prime is 1311320111369. The reversal of 1311320111311 is 1131110231131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1311320111311 - 2¹⁵ = 1311320078543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311320111611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 490395115 + ... + 490397788.

It is an arithmetic number, because the mean of its divisors is an integer number (188312237568).

Almost surely, 2^{1311320111311} is an apocalyptic number.

1311320111311 is a deficient number, since it is larger than the sum of its proper divisors (195177789233).

1311320111311 is an equidigital number, since it uses as much as digits as its factorization.

1311320111311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980793101.

The product of its (nonzero) digits is 54, while the sum is 19.

Adding to 1311320111311 its reverse (1131110231131), we get a palindrome (2442430342442).

The spelling of 1311320111311 in words is "one trillion, three hundred eleven billion, three hundred twenty million, one hundred eleven thousand, three hundred eleven".