111142122 has 128 divisors (see below), whose sum is σ = 287981568. Its totient is φ = 27820800.

The previous prime is 111142093. The next prime is 111142127. The reversal of 111142122 is 221241111.

It is not an unprimeable number, because it can be changed into a prime (111142127) 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, 1565347 + ... + 1565417.

It is an arithmetic number, because the mean of its divisors is an integer number (2249856).

Almost surely, 2^111142122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111142122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143990784).

111142122 is an abundant number, since it is smaller than the sum of its proper divisors (176839446).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111142122 is a wasteful number, since it uses less digits than its factorization.

111142122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204.

The product of its digits is 32, while the sum is 15.

The square root of 111142122 is about 10542.3964068897. The cubic root of 111142122 is about 480.7945780500.

Adding to 111142122 its reverse (221241111), we get a palindrome (332383233).

The spelling of 111142122 in words is "one hundred eleven million, one hundred forty-two thousand, one hundred twenty-two".