111311222011 has 32 divisors (see below), whose sum is σ = 132011550720. Its totient is φ = 92726726400.

The previous prime is 111311221961. The next prime is 111311222017. The reversal of 111311222011 is 110222113111.

It is a happy number.

It is not a de Polignac number, because 111311222011 - 2²⁷ = 111177004283 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111311222017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19673895 + ... + 19679551.

It is an arithmetic number, because the mean of its divisors is an integer number (4125360960).

Almost surely, 2^111311222011 is an apocalyptic number.

111311222011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111311222011 is a deficient number, since it is larger than the sum of its proper divisors (20700328709).

111311222011 is a wasteful number, since it uses less digits than its factorization.

111311222011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8755.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 111311222011 its reverse (110222113111), we get a palindrome (221533335122).

The spelling of 111311222011 in words is "one hundred eleven billion, three hundred eleven million, two hundred twenty-two thousand, eleven".