11311113131 has 4 divisors (see below), whose sum is σ = 11319352752. Its totient is φ = 11302873512.

The previous prime is 11311113097. The next prime is 11311113179. The reversal of 11311113131 is 13131111311.

11311113131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13131111311 = 19051 ⋅689261.

It is a cyclic number.

It is not a de Polignac number, because 11311113131 - 2⁶ = 11311113067 is a prime.

It is a super-2 number, since 2×11311113131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11311113631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4117751 + ... + 4120496.

It is an arithmetic number, because the mean of its divisors is an integer number (2829838188).

Almost surely, 2^11311113131 is an apocalyptic number.

11311113131 is a deficient number, since it is larger than the sum of its proper divisors (8239621).

11311113131 is an equidigital number, since it uses as much as digits as its factorization.

11311113131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8239620.

The product of its digits is 27, while the sum is 17.

Adding to 11311113131 its reverse (13131111311), we get a palindrome (24442224442).

The spelling of 11311113131 in words is "eleven billion, three hundred eleven million, one hundred thirteen thousand, one hundred thirty-one".