1221032568 has 96 divisors (see below), whose sum is σ = 3737923200. Its totient is φ = 330499008.

The previous prime is 1221032551. The next prime is 1221032623. The reversal of 1221032568 is 8652301221.

1221032568 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4980 + ... + 49667.

It is an arithmetic number, because the mean of its divisors is an integer number (38936700).

Almost surely, 2^1221032568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1221032568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1868961600).

1221032568 is an abundant number, since it is smaller than the sum of its proper divisors (2516890632).

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

1221032568 is a wasteful number, since it uses less digits than its factorization.

1221032568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54689 (or 54678 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 1221032568 is about 34943.2764348165. The cubic root of 1221032568 is about 1068.8311013179.

Adding to 1221032568 its reverse (8652301221), we get a palindrome (9873333789).

The spelling of 1221032568 in words is "one billion, two hundred twenty-one million, thirty-two thousand, five hundred sixty-eight".