1321111232 has 28 divisors (see below), whose sum is σ = 2996092560. Its totient is φ = 566190336.

The previous prime is 1321111223. The next prime is 1321111261. The reversal of 1321111232 is 2321111231.

It is a tau number, because it is divible by the number of its divisors (28).

It is a self number, because there is not a number n which added to its sum of digits gives 1321111232.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1474007 + ... + 1474902.

Almost surely, 2^1321111232 is an apocalyptic number.

It is an amenable number.

1321111232 is an abundant number, since it is smaller than the sum of its proper divisors (1674981328).

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

1321111232 is an equidigital number, since it uses as much as digits as its factorization.

1321111232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2948928 (or 2948918 counting only the distinct ones).

The product of its digits is 72, while the sum is 17.

The square root of 1321111232 is about 36347.0938590694. The cubic root of 1321111232 is about 1097.2690470038.

Adding to 1321111232 its reverse (2321111231), we get a palindrome (3642222463).

Subtracting 1321111232 from its reverse (2321111231), we obtain a palindrome (999999999).

The spelling of 1321111232 in words is "one billion, three hundred twenty-one million, one hundred eleven thousand, two hundred thirty-two".