1221450224 has 10 divisors (see below), whose sum is σ = 2366559840. Its totient is φ = 610725104.

The previous prime is 1221450211. The next prime is 1221450227. The reversal of 1221450224 is 4220541221.

It is a self number, because there is not a number n which added to its sum of digits gives 1221450224.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221450227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38170304 + ... + 38170335.

It is an arithmetic number, because the mean of its divisors is an integer number (236655984).

Almost surely, 2^1221450224 is an apocalyptic number.

It is an amenable number.

1221450224 is a deficient number, since it is larger than the sum of its proper divisors (1145109616).

1221450224 is an equidigital number, since it uses as much as digits as its factorization.

1221450224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76340647 (or 76340641 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 1221450224 is about 34949.2521236149. The cubic root of 1221450224 is about 1068.9529525134.

Adding to 1221450224 its reverse (4220541221), we get a palindrome (5441991445).

The spelling of 1221450224 in words is "one billion, two hundred twenty-one million, four hundred fifty thousand, two hundred twenty-four".