111231142 has 32 divisors (see below), whose sum is σ = 185462784. Its totient is φ = 49612800.

The previous prime is 111231103. The next prime is 111231143. The reversal of 111231142 is 241132111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111231143) 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, 432678 + ... + 432934.

It is an arithmetic number, because the mean of its divisors is an integer number (5795712).

Almost surely, 2^111231142 is an apocalyptic number.

111231142 is a deficient number, since it is larger than the sum of its proper divisors (74231642).

111231142 is a wasteful number, since it uses less digits than its factorization.

111231142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564.

The product of its digits is 48, while the sum is 16.

The square root of 111231142 is about 10546.6175620433. The cubic root of 111231142 is about 480.9229089672.

Adding to 111231142 its reverse (241132111), we get a palindrome (352363253).

The spelling of 111231142 in words is "one hundred eleven million, two hundred thirty-one thousand, one hundred forty-two".