121236224 has 18 divisors (see below), whose sum is σ = 241999380. Its totient is φ = 60617984.

The previous prime is 121236223. The next prime is 121236229. The reversal of 121236224 is 422632121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 121236224.

It is not an unprimeable number, because it can be changed into a prime (121236223) 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 as a sum of consecutive naturals, namely, 236534 + ... + 237045.

It is an arithmetic number, because the mean of its divisors is an integer number (13444410).

Almost surely, 2^121236224 is an apocalyptic number.

It is an amenable number.

121236224 is a deficient number, since it is larger than the sum of its proper divisors (120763156).

121236224 is an frugal number, since it uses more digits than its factorization.

121236224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473595 (or 473581 counting only the distinct ones).

The product of its digits is 1152, while the sum is 23.

The square root of 121236224 is about 11010.7322190670. The cubic root of 121236224 is about 494.9304041188.

Adding to 121236224 its reverse (422632121), we get a palindrome (543868345).

The spelling of 121236224 in words is "one hundred twenty-one million, two hundred thirty-six thousand, two hundred twenty-four".