1221033264 has 60 divisors (see below), whose sum is σ = 3467179128. Its totient is φ = 370008320.

The previous prime is 1221033199. The next prime is 1221033277. The reversal of 1221033264 is 4623301221.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 99309 + ... + 110924.

Almost surely, 2^1221033264 is an apocalyptic number.

It is an amenable number.

1221033264 is an abundant number, since it is smaller than the sum of its proper divisors (2246145864).

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

1221033264 is a wasteful number, since it uses less digits than its factorization.

1221033264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210266 (or 210249 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 1221033264 is about 34943.2863938125. The cubic root of 1221033264 is about 1068.8313043991.

Adding to 1221033264 its reverse (4623301221), we get a palindrome (5844334485).

The spelling of 1221033264 in words is "one billion, two hundred twenty-one million, thirty-three thousand, two hundred sixty-four".