1221134224 has 10 divisors (see below), whose sum is σ = 2365947590. Its totient is φ = 610567104.

The previous prime is 1221134221. The next prime is 1221134251. The reversal of 1221134224 is 4224311221.

It can be written as a sum of positive squares in only one way, i.e., 1215219600 + 5914624 = 34860^2 + 2432^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1221134195 and 1221134204.

It is not an unprimeable number, because it can be changed into a prime (1221134221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38160429 + ... + 38160460.

It is an arithmetic number, because the mean of its divisors is an integer number (236594759).

Almost surely, 2^1221134224 is an apocalyptic number.

It is an amenable number.

1221134224 is a deficient number, since it is larger than the sum of its proper divisors (1144813366).

1221134224 is an equidigital number, since it uses as much as digits as its factorization.

1221134224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76320897 (or 76320891 counting only the distinct ones).

The product of its digits is 768, while the sum is 22.

The square root of 1221134224 is about 34944.7309905227. The cubic root of 1221134224 is about 1068.8607620281.

Adding to 1221134224 its reverse (4224311221), we get a palindrome (5445445445).

The spelling of 1221134224 in words is "one billion, two hundred twenty-one million, one hundred thirty-four thousand, two hundred twenty-four".