1221334326 has 24 divisors (see below), whose sum is σ = 2785500120. Its totient is φ = 385684416.

The previous prime is 1221334321. The next prime is 1221334337. The reversal of 1221334326 is 6234331221.

1221334326 is a `hidden beast` number, since 1 + 2 + 2 + 1 + 334 + 326 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1221334326.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221334321) 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 in 11 ways as a sum of consecutive naturals, for example, 1785235 + ... + 1785918.

It is an arithmetic number, because the mean of its divisors is an integer number (116062505).

Almost surely, 2^1221334326 is an apocalyptic number.

1221334326 is an abundant number, since it is smaller than the sum of its proper divisors (1564165794).

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

1221334326 is a wasteful number, since it uses less digits than its factorization.

1221334326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3571180 (or 3571177 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

The square root of 1221334326 is about 34947.5939944369. The cubic root of 1221334326 is about 1068.9191420408.

Adding to 1221334326 its reverse (6234331221), we get a palindrome (7455665547).

The spelling of 1221334326 in words is "one billion, two hundred twenty-one million, three hundred thirty-four thousand, three hundred twenty-six".