112217121 has 6 divisors (see below), whose sum is σ = 162091410. Its totient is φ = 74811408.

The previous prime is 112217113. The next prime is 112217137. The reversal of 112217121 is 121712211.

It can be written as a sum of positive squares in only one way, i.e., 103306896 + 8910225 = 10164^2 + 2985^2 .

It is not a de Polignac number, because 112217121 - 2³ = 112217113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 112217094 and 112217103.

It is not an unprimeable number, because it can be changed into a prime (112217191) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6234276 + ... + 6234293.

It is an arithmetic number, because the mean of its divisors is an integer number (27015235).

Almost surely, 2^112217121 is an apocalyptic number.

It is an amenable number.

112217121 is a deficient number, since it is larger than the sum of its proper divisors (49874289).

112217121 is a wasteful number, since it uses less digits than its factorization.

112217121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12468575 (or 12468572 counting only the distinct ones).

The product of its digits is 56, while the sum is 18.

The square root of 112217121 is about 10593.2582806236. The cubic root of 112217121 is about 482.3397354029.

Adding to 112217121 its reverse (121712211), we get a palindrome (233929332).

The spelling of 112217121 in words is "one hundred twelve million, two hundred seventeen thousand, one hundred twenty-one".