112213121 has 4 divisors (see below), whose sum is σ = 113324244. Its totient is φ = 111102000.

The previous prime is 112213109. The next prime is 112213169. The reversal of 112213121 is 121312211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121312211 = 101 ⋅1201111.

It can be written as a sum of positive squares in 2 ways, for example, as 74218225 + 37994896 = 8615^2 + 6164^2 .

It is a cyclic number.

It is not a de Polignac number, because 112213121 - 2¹⁸ = 111950977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 112213096 and 112213105.

It is not an unprimeable number, because it can be changed into a prime (112213721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555410 + ... + 555611.

It is an arithmetic number, because the mean of its divisors is an integer number (28331061).

Almost surely, 2^112213121 is an apocalyptic number.

It is an amenable number.

112213121 is a deficient number, since it is larger than the sum of its proper divisors (1111123).

112213121 is a wasteful number, since it uses less digits than its factorization.

112213121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111122.

The product of its digits is 24, while the sum is 14.

The square root of 112213121 is about 10593.0694796173. The cubic root of 112213121 is about 482.3340043052.

Adding to 112213121 its reverse (121312211), we get a palindrome (233525332).

The spelling of 112213121 in words is "one hundred twelve million, two hundred thirteen thousand, one hundred twenty-one".