1311322320113 has 4 divisors (see below), whose sum is σ = 1412193267828. Its totient is φ = 1210451372400.

The previous prime is 1311322320101. The next prime is 1311322320149. The reversal of 1311322320113 is 3110232231131.

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

It can be written as a sum of positive squares in 2 ways, for example, as 863964673009 + 447357647104 = 929497^2 + 668848^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311322320113 - 2¹⁴ = 1311322303729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311322325113) 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, 50435473838 + ... + 50435473863.

It is an arithmetic number, because the mean of its divisors is an integer number (353048316957).

Almost surely, 2^{1311322320113} is an apocalyptic number.

1311322320113 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1311322320113 is a deficient number, since it is larger than the sum of its proper divisors (100870947715).

1311322320113 is a wasteful number, since it uses less digits than its factorization.

1311322320113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100870947714.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 1311322320113 its reverse (3110232231131), we get a palindrome (4421554551244).

The spelling of 1311322320113 in words is "one trillion, three hundred eleven billion, three hundred twenty-two million, three hundred twenty thousand, one hundred thirteen".