1311540111043 has 16 divisors (see below), whose sum is σ = 1425885806880. Its totient is φ = 1202368437504.

The previous prime is 1311540111041. The next prime is 1311540111137. The reversal of 1311540111043 is 3401110451131.

It is a cyclic number.

It is not a de Polignac number, because 1311540111043 - 2¹ = 1311540111041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1311540110999 and 1311540111017.

It is not an unprimeable number, because it can be changed into a prime (1311540111041) 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, 8847196 + ... + 8994217.

It is an arithmetic number, because the mean of its divisors is an integer number (89117862930).

Almost surely, 2^{1311540111043} is an apocalyptic number.

1311540111043 is a deficient number, since it is larger than the sum of its proper divisors (114345695837).

1311540111043 is a wasteful number, since it uses less digits than its factorization.

1311540111043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17841558.

The product of its (nonzero) digits is 720, while the sum is 25.

Adding to 1311540111043 its reverse (3401110451131), we get a palindrome (4712650562174).

The spelling of 1311540111043 in words is "one trillion, three hundred eleven billion, five hundred forty million, one hundred eleven thousand, forty-three".