1311320111232 has 64 divisors (see below), whose sum is σ = 3483429091200. Its totient is φ = 437077208064.

The previous prime is 1311320111209. The next prime is 1311320111237. The reversal of 1311320111232 is 2321110231131.

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

It is a junction number, because it is equal to n+sod(n) for n = 1311320111199 and 1311320111208.

It is not an unprimeable number, because it can be changed into a prime (1311320111237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6005638 + ... + 6220154.

It is an arithmetic number, because the mean of its divisors is an integer number (54428579550).

Almost surely, 2^{1311320111232} is an apocalyptic number.

1311320111232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1311320111232 is an abundant number, since it is smaller than the sum of its proper divisors (2172108979968).

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

1311320111232 is a wasteful number, since it uses less digits than its factorization.

1311320111232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230453 (or 230441 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 1311320111232 its reverse (2321110231131), we get a palindrome (3632430342363).

The spelling of 1311320111232 in words is "one trillion, three hundred eleven billion, three hundred twenty million, one hundred eleven thousand, two hundred thirty-two".