111112681 has 9 divisors (see below), whose sum is σ = 113360061. Its totient is φ = 108909612.

The previous prime is 111112679. The next prime is 111112709. The reversal of 111112681 is 186211111.

The square root of 111112681 is 10541.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 111112681 - 2¹ = 111112679 is a prime.

It is a super-2 number, since 2×111112681² = 24692055758015522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111112081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 874840 + ... + 874966.

Almost surely, 2^111112681 is an apocalyptic number.

111112681 is the 10541-st square number.

111112681 is the 5271-st centered octagonal number.

It is an amenable number.

111112681 is a deficient number, since it is larger than the sum of its proper divisors (2247380).

111112681 is an frugal number, since it uses more digits than its factorization.

111112681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420 (or 210 counting only the distinct ones).

The product of its digits is 96, while the sum is 22.

The cubic root of 111112681 is about 480.7521209300.

Adding to 111112681 its reverse (186211111), we get a palindrome (297323792).

The spelling of 111112681 in words is "one hundred eleven million, one hundred twelve thousand, six hundred eighty-one".