13111231443 has 16 divisors (see below), whose sum is σ = 18409079040. Its totient is φ = 8284076064.

The previous prime is 13111231417. The next prime is 13111231457. The reversal of 13111231443 is 34413211131.

It is a happy number.

It is not a de Polignac number, because 13111231443 - 2⁶ = 13111231379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13111231643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 864121 + ... + 879162.

It is an arithmetic number, because the mean of its divisors is an integer number (1150567440).

Almost surely, 2^13111231443 is an apocalyptic number.

13111231443 is a deficient number, since it is larger than the sum of its proper divisors (5297847597).

13111231443 is a wasteful number, since it uses less digits than its factorization.

13111231443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1743418.

The product of its digits is 864, while the sum is 24.

Adding to 13111231443 its reverse (34413211131), we get a palindrome (47524442574).

The spelling of 13111231443 in words is "thirteen billion, one hundred eleven million, two hundred thirty-one thousand, four hundred forty-three".