111720216 has 16 divisors (see below), whose sum is σ = 279300600. Its totient is φ = 37240064.

The previous prime is 111720211. The next prime is 111720227. The reversal of 111720216 is 612027111.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 111720192 and 111720201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111720211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2327481 + ... + 2327528.

Almost surely, 2^111720216 is an apocalyptic number.

It is an amenable number.

111720216 is an abundant number, since it is smaller than the sum of its proper divisors (167580384).

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

111720216 is a wasteful number, since it uses less digits than its factorization.

111720216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4655018 (or 4655014 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 21.

The square root of 111720216 is about 10569.7784271952. The cubic root of 111720216 is about 481.6267376428.

Adding to 111720216 its reverse (612027111), we get a palindrome (723747327).

The spelling of 111720216 in words is "one hundred eleven million, seven hundred twenty thousand, two hundred sixteen".