121222112 has 48 divisors (see below), whose sum is σ = 261246384. Its totient is φ = 54912000.

The previous prime is 121222099. The next prime is 121222133. The reversal of 121222112 is 211222121.

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183062 + ... + 183722.

It is an arithmetic number, because the mean of its divisors is an integer number (5442633).

Almost surely, 2^121222112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121222112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130623192).

121222112 is an abundant number, since it is smaller than the sum of its proper divisors (140024272).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121222112 is a wasteful number, since it uses less digits than its factorization.

121222112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1203 (or 1195 counting only the distinct ones).

The product of its digits is 32, while the sum is 14.

The square root of 121222112 is about 11010.0913711013. The cubic root of 121222112 is about 494.9111999331.

Adding to 121222112 its reverse (211222121), we get a palindrome (332444233).

Subtracting 121222112 from its reverse (211222121), we obtain a palindrome (90000009).

The spelling of 121222112 in words is "one hundred twenty-one million, two hundred twenty-two thousand, one hundred twelve".