111123660 has 48 divisors (see below), whose sum is σ = 311867136. Its totient is φ = 29564352.

The previous prime is 111123643. The next prime is 111123667. The reversal of 111123660 is 66321111.

It is not an unprimeable number, because it can be changed into a prime (111123667) 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, 27319 + ... + 31121.

It is an arithmetic number, because the mean of its divisors is an integer number (6497232).

Almost surely, 2^111123660 is an apocalyptic number.

111123660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111123660 is an abundant number, since it is smaller than the sum of its proper divisors (200743476).

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

111123660 is a wasteful number, since it uses less digits than its factorization.

111123660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4302 (or 4300 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 111123660 is about 10541.5207631537. The cubic root of 111123660 is about 480.7679547174.

Adding to 111123660 its reverse (66321111), we get a palindrome (177444771).

The spelling of 111123660 in words is "one hundred eleven million, one hundred twenty-three thousand, six hundred sixty".