112111221 has 24 divisors (see below), whose sum is σ = 158784672. Its totient is φ = 70308000.

The previous prime is 112111213. The next prime is 112111231. The reversal of 112111221 is 122111211.

It is not a de Polignac number, because 112111221 - 2³ = 112111213 is a prime.

It is a super-2 number, since 2×112111221² = 25137851748221682, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 112111197 and 112111206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112111211) 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 23 ways as a sum of consecutive naturals, for example, 106146 + ... + 107196.

It is an arithmetic number, because the mean of its divisors is an integer number (6616028).

Almost surely, 2^112111221 is an apocalyptic number.

It is an amenable number.

112111221 is a deficient number, since it is larger than the sum of its proper divisors (46673451).

112111221 is a wasteful number, since it uses less digits than its factorization.

112111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1153 (or 1122 counting only the distinct ones).

The product of its digits is 8, while the sum is 12.

The square root of 112111221 is about 10588.2586386998. The cubic root of 112111221 is about 482.1879586388.

Adding to 112111221 its reverse (122111211), we get a palindrome (234222432).

It can be divided in two parts, 11211 and 1221, that multiplied together give a palindrome (13688631).

The spelling of 112111221 in words is "one hundred twelve million, one hundred eleven thousand, two hundred twenty-one".