1321320111232 has 64 divisors (see below), whose sum is σ = 2932717415040. Its totient is φ = 587821296640.

The previous prime is 1321320111211. The next prime is 1321320111299. The reversal of 1321320111232 is 2321110231231.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×1321320111232² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9917203 + ... + 10049554.

It is an arithmetic number, because the mean of its divisors is an integer number (45823709610).

Almost surely, 2^{1321320111232} is an apocalyptic number.

It is an amenable number.

1321320111232 is an abundant number, since it is smaller than the sum of its proper divisors (1611397303808).

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

1321320111232 is a wasteful number, since it uses less digits than its factorization.

1321320111232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19966829 (or 19966817 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1321320111232 its reverse (2321110231231), we get a palindrome (3642430342463).

The spelling of 1321320111232 in words is "one trillion, three hundred twenty-one billion, three hundred twenty million, one hundred eleven thousand, two hundred thirty-two".