111311272 has 16 divisors (see below), whose sum is σ = 219693600. Its totient is φ = 52726320.

The previous prime is 111311261. The next prime is 111311287. The reversal of 111311272 is 272113111.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is an unprimeable number.

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, 366004 + ... + 366307.

It is an arithmetic number, because the mean of its divisors is an integer number (13730850).

Almost surely, 2^111311272 is an apocalyptic number.

It is an amenable number.

111311272 is a deficient number, since it is larger than the sum of its proper divisors (108382328).

111311272 is a wasteful number, since it uses less digits than its factorization.

111311272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732336 (or 732332 counting only the distinct ones).

The product of its digits is 84, while the sum is 19.

The square root of 111311272 is about 10550.4157264062. The cubic root of 111311272 is about 481.0383655499.

Adding to 111311272 its reverse (272113111), we get a palindrome (383424383).

It can be divided in two parts, 11131 and 1272, that added together give a triangular number (12403 = T₁₅₇).

The spelling of 111311272 in words is "one hundred eleven million, three hundred eleven thousand, two hundred seventy-two".