121321224 has 48 divisors (see below), whose sum is σ = 337466220. Its totient is φ = 39346560.

The previous prime is 121321177. The next prime is 121321229. The reversal of 121321224 is 422123121.

It is a happy number.

121321224 is a `hidden beast` number, since 121 + 321 + 224 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 121220100 + 101124 = 11010^2 + 318^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

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

It is a junction number, because it is equal to n+sod(n) for n = 121321197 and 121321206.

It is not an unprimeable number, because it can be changed into a prime (121321229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20107 + ... + 25434.

Almost surely, 2^121321224 is an apocalyptic number.

It is an amenable number.

121321224 is an abundant number, since it is smaller than the sum of its proper divisors (216144996).

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

121321224 is a wasteful number, since it uses less digits than its factorization.

121321224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45590 (or 45583 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 121321224 is about 11014.5914132118. The cubic root of 121321224 is about 495.0460440793.

Adding to 121321224 its reverse (422123121), we get a palindrome (543444345).

The spelling of 121321224 in words is "one hundred twenty-one million, three hundred twenty-one thousand, two hundred twenty-four".