111212116 has 6 divisors (see below), whose sum is σ = 194621210. Its totient is φ = 55606056.

The previous prime is 111212099. The next prime is 111212117. The reversal of 111212116 is 611212111.

It can be written as a sum of positive squares in only one way, i.e., 81072016 + 30140100 = 9004^2 + 5490^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 111212116.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111212117) 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 as a sum of consecutive naturals, namely, 13901511 + ... + 13901518.

Almost surely, 2^111212116 is an apocalyptic number.

It is an amenable number.

111212116 is a deficient number, since it is larger than the sum of its proper divisors (83409094).

111212116 is a wasteful number, since it uses less digits than its factorization.

111212116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27803033 (or 27803031 counting only the distinct ones).

The product of its digits is 24, while the sum is 16.

The square root of 111212116 is about 10545.7155281185. The cubic root of 111212116 is about 480.8954869076.

Adding to 111212116 its reverse (611212111), we get a palindrome (722424227).

The spelling of 111212116 in words is "one hundred eleven million, two hundred twelve thousand, one hundred sixteen".