111431011111 has 16 divisors (see below), whose sum is σ = 133545787200. Its totient is φ = 90955484928.

The previous prime is 111431011093. The next prime is 111431011117. The reversal of 111431011111 is 111110134111.

It is not a de Polignac number, because 111431011111 - 2⁵ = 111431011079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111431011117) 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, 3744916 + ... + 3774553.

It is an arithmetic number, because the mean of its divisors is an integer number (8346611700).

Almost surely, 2^111431011111 is an apocalyptic number.

111431011111 is a deficient number, since it is larger than the sum of its proper divisors (22114776089).

111431011111 is an equidigital number, since it uses as much as digits as its factorization.

111431011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7519578.

The product of its (nonzero) digits is 12, while the sum is 16.

Adding to 111431011111 its reverse (111110134111), we get a palindrome (222541145222).

The spelling of 111431011111 in words is "one hundred eleven billion, four hundred thirty-one million, eleven thousand, one hundred eleven".