121320224 has 48 divisors (see below), whose sum is σ = 248572800. Its totient is φ = 58216704.

The previous prime is 121320223. The next prime is 121320257. The reversal of 121320224 is 422023121.

It is not an unprimeable number, because it can be changed into a prime (121320223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221519 + ... + 222065.

It is an arithmetic number, because the mean of its divisors is an integer number (5178600).

Almost surely, 2^121320224 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 121320224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124286400).

121320224 is an abundant number, since it is smaller than the sum of its proper divisors (127252576).

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

121320224 is a wasteful number, since it uses less digits than its factorization.

121320224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825 (or 817 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 121320224 is about 11014.5460187881. The cubic root of 121320224 is about 495.0446839232.

Adding to 121320224 its reverse (422023121), we get a palindrome (543343345).

The spelling of 121320224 in words is "one hundred twenty-one million, three hundred twenty thousand, two hundred twenty-four".