1221304234 has 16 divisors (see below), whose sum is σ = 1852484040. Its totient is φ = 603832320.

The previous prime is 1221304229. The next prime is 1221304237. The reversal of 1221304234 is 4324031221.

It can be written as a sum of positive squares in 4 ways, for example, as 1202355625 + 18948609 = 34675^2 + 4353^2 .

It is not an unprimeable number, because it can be changed into a prime (1221304237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108202 + ... + 118954.

Almost surely, 2^1221304234 is an apocalyptic number.

1221304234 is a deficient number, since it is larger than the sum of its proper divisors (631179806).

1221304234 is a wasteful number, since it uses less digits than its factorization.

1221304234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11385.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 1221304234 is about 34947.1634614313. The cubic root of 1221304234 is about 1068.9103630690.

Adding to 1221304234 its reverse (4324031221), we get a palindrome (5545335455).

The spelling of 1221304234 in words is "one billion, two hundred twenty-one million, three hundred four thousand, two hundred thirty-four".