111120122121 has 64 divisors (see below), whose sum is σ = 158912409600. Its totient is φ = 68939942400.

The previous prime is 111120122089. The next prime is 111120122147. The reversal of 111120122121 is 121221021111.

It is a happy number.

It is not a de Polignac number, because 111120122121 - 2⁵ = 111120122089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111120122121.

It is not an unprimeable number, because it can be changed into a prime (111120122161) 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 63 ways as a sum of consecutive naturals, for example, 134364910 + ... + 134365736.

It is an arithmetic number, because the mean of its divisors is an integer number (2483006400).

Almost surely, 2^111120122121 is an apocalyptic number.

It is an amenable number.

111120122121 is a deficient number, since it is larger than the sum of its proper divisors (47792287479).

111120122121 is a wasteful number, since it uses less digits than its factorization.

111120122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1310.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 111120122121 its reverse (121221021111), we get a palindrome (232341143232).

The spelling of 111120122121 in words is "one hundred eleven billion, one hundred twenty million, one hundred twenty-two thousand, one hundred twenty-one".