11503131311043 has 40 divisors (see below), whose sum is σ = 17648683825520. Its totient is φ = 7461249681600.

The previous prime is 11503131311027. The next prime is 11503131311053. The reversal of 11503131311043 is 34011313130511.

11503131311043 is a `hidden beast` number, since 1 + 1 + 503 + 1 + 3 + 1 + 3 + 110 + 43 = 666.

It is not a de Polignac number, because 11503131311043 - 2⁴ = 11503131311027 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11503131310998 and 11503131311016.

It is not an unprimeable number, because it can be changed into a prime (11503131311053) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 182938413 + ... + 183001281.

It is an arithmetic number, because the mean of its divisors is an integer number (441217095638).

Almost surely, 2^{11503131311043} is an apocalyptic number.

11503131311043 is a deficient number, since it is larger than the sum of its proper divisors (6145552514477).

11503131311043 is an equidigital number, since it uses as much as digits as its factorization.

11503131311043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123969 (or 123960 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

Adding to 11503131311043 its reverse (34011313130511), we get a palindrome (45514444441554).

The spelling of 11503131311043 in words is "eleven trillion, five hundred three billion, one hundred thirty-one million, three hundred eleven thousand, forty-three".