111243612 has 12 divisors (see below), whose sum is σ = 259568456. Its totient is φ = 37081200.

The previous prime is 111243611. The next prime is 111243637. The reversal of 111243612 is 216342111.

It is a tau number, because it is divible by the number of its divisors (12).

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 (111243611) 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, 4635139 + ... + 4635162.

Almost surely, 2^111243612 is an apocalyptic number.

111243612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111243612 is an abundant number, since it is smaller than the sum of its proper divisors (148324844).

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

111243612 is a wasteful number, since it uses less digits than its factorization.

111243612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9270308 (or 9270306 counting only the distinct ones).

The product of its digits is 288, while the sum is 21.

The square root of 111243612 is about 10547.2087302755. The cubic root of 111243612 is about 480.9408802070.

Adding to 111243612 its reverse (216342111), we get a palindrome (327585723).

The spelling of 111243612 in words is "one hundred eleven million, two hundred forty-three thousand, six hundred twelve".