111212144 has 20 divisors (see below), whose sum is σ = 215812824. Its totient is φ = 55518528.

The previous prime is 111212141. The next prime is 111212173. The reversal of 111212144 is 441212111.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111212141) 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, 5699 + ... + 15965.

Almost surely, 2^111212144 is an apocalyptic number.

It is an amenable number.

111212144 is a deficient number, since it is larger than the sum of its proper divisors (104600680).

111212144 is a wasteful number, since it uses less digits than its factorization.

111212144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10952 (or 10946 counting only the distinct ones).

The product of its digits is 64, while the sum is 17.

The square root of 111212144 is about 10545.7168556718. The cubic root of 111212144 is about 480.8955272661.

Adding to 111212144 its reverse (441212111), we get a palindrome (552424255).

The spelling of 111212144 in words is "one hundred eleven million, two hundred twelve thousand, one hundred forty-four".