111121142 has 16 divisors (see below), whose sum is σ = 189741312. Its totient is φ = 48313320.

The previous prime is 111121121. The next prime is 111121151. The reversal of 111121142 is 241121111.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 109298 + ... + 110309.

It is an arithmetic number, because the mean of its divisors is an integer number (11858832).

Almost surely, 2^111121142 is an apocalyptic number.

111121142 is a deficient number, since it is larger than the sum of its proper divisors (78620170).

111121142 is a wasteful number, since it uses less digits than its factorization.

111121142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219643.

The product of its digits is 16, while the sum is 14.

The square root of 111121142 is about 10541.4013299940. The cubic root of 111121142 is about 480.7643233790.

Adding to 111121142 its reverse (241121111), we get a palindrome (352242253).

The spelling of 111121142 in words is "one hundred eleven million, one hundred twenty-one thousand, one hundred forty-two".