1221330032 has 80 divisors (see below), whose sum is σ = 2745240960. Its totient is φ = 521531136.

The previous prime is 1221330029. The next prime is 1221330043. The reversal of 1221330032 is 2300331221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166343 + ... + 173529.

It is an arithmetic number, because the mean of its divisors is an integer number (34315512).

Almost surely, 2^1221330032 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 1221330032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1372620480).

1221330032 is an abundant number, since it is smaller than the sum of its proper divisors (1523910928).

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

1221330032 is a wasteful number, since it uses less digits than its factorization.

1221330032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7270 (or 7264 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 1221330032 is about 34947.5325595384. The cubic root of 1221330032 is about 1068.9178893278.

Adding to 1221330032 its reverse (2300331221), we get a palindrome (3521661253).

The spelling of 1221330032 in words is "one billion, two hundred twenty-one million, three hundred thirty thousand, thirty-two".