111990124 has 24 divisors (see below), whose sum is σ = 199825920. Its totient is φ = 54907776.

The previous prime is 111990107. The next prime is 111990133. The reversal of 111990124 is 421099111.

It is a junction number, because it is equal to n+sod(n) for n = 111990092 and 111990101.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43974 + ... + 46450.

It is an arithmetic number, because the mean of its divisors is an integer number (8326080).

Almost surely, 2^111990124 is an apocalyptic number.

It is an amenable number.

111990124 is a deficient number, since it is larger than the sum of its proper divisors (87835796).

111990124 is a wasteful number, since it uses less digits than its factorization.

111990124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2697 (or 2695 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 28.

The square root of 111990124 is about 10582.5386368300. The cubic root of 111990124 is about 482.0142842251.

The spelling of 111990124 in words is "one hundred eleven million, nine hundred ninety thousand, one hundred twenty-four".