121224 has 16 divisors (see below), whose sum is σ = 303120. Its totient is φ = 40400.

The previous prime is 121189. The next prime is 121229. The reversal of 121224 is 422121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (121229) by changing a digit.

121224 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2502 + ... + 2549.

It is an arithmetic number, because the mean of its divisors is an integer number (18945).

2¹²¹²²⁴ is an apocalyptic number.

It is an amenable number.

121224 is an abundant number, since it is smaller than the sum of its proper divisors (181896).

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

121224 is a wasteful number, since it uses less digits than its factorization.

121224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5060 (or 5056 counting only the distinct ones).

The product of its digits is 32, while the sum is 12.

The square root of 121224 is about 348.1723711037. The cubic root of 121224 is about 49.4913769287.

Adding to 121224 its reverse (422121), we get a palindrome (543345).

The spelling of 121224 in words is "one hundred twenty-one thousand, two hundred twenty-four", and thus it is an iban number.