111142142 has 4 divisors (see below), whose sum is σ = 166713216. Its totient is φ = 55571070.

The previous prime is 111142133. The next prime is 111142217. The reversal of 111142142 is 241241111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 241241111 = 29 ⋅8318659.

It is a self number, because there is not a number n which added to its sum of digits gives 111142142.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 27785534 + ... + 27785537.

It is an arithmetic number, because the mean of its divisors is an integer number (41678304).

Almost surely, 2^111142142 is an apocalyptic number.

111142142 is a deficient number, since it is larger than the sum of its proper divisors (55571074).

111142142 is an equidigital number, since it uses as much as digits as its factorization.

111142142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55571073.

The product of its digits is 64, while the sum is 17.

The square root of 111142142 is about 10542.3973554406. The cubic root of 111142142 is about 480.7946068897.

Adding to 111142142 its reverse (241241111), we get a palindrome (352383253).

The spelling of 111142142 in words is "one hundred eleven million, one hundred forty-two thousand, one hundred forty-two".