1321043332 has 72 divisors (see below), whose sum is σ = 2751350784. Its totient is φ = 553246848.

The previous prime is 1321043309. The next prime is 1321043333. The reversal of 1321043332 is 2333401231.

It is not an unprimeable number, because it can be changed into a prime (1321043333) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1816753 + ... + 1817479.

Almost surely, 2^1321043332 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 1321043332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1375675392).

1321043332 is an abundant number, since it is smaller than the sum of its proper divisors (1430307452).

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

1321043332 is a wasteful number, since it uses less digits than its factorization.

1321043332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 945 (or 936 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

The square root of 1321043332 is about 36346.1597971505. The cubic root of 1321043332 is about 1097.2502482221.

Adding to 1321043332 its reverse (2333401231), we get a palindrome (3654444563).

The spelling of 1321043332 in words is "one billion, three hundred twenty-one million, forty-three thousand, three hundred thirty-two".