1311331112 has 96 divisors (see below), whose sum is σ = 3084883200. Its totient is φ = 508809600.

The previous prime is 1311331111. The next prime is 1311331123. The reversal of 1311331112 is 2111331131.

It is not an unprimeable number, because it can be changed into a prime (1311331111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8684237 + ... + 8684387.

It is an arithmetic number, because the mean of its divisors is an integer number (32134200).

Almost surely, 2^1311331112 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 1311331112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1542441600).

1311331112 is an abundant number, since it is smaller than the sum of its proper divisors (1773552088).

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

1311331112 is a wasteful number, since it uses less digits than its factorization.

1311331112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407 (or 252 counting only the distinct ones).

The product of its digits is 54, while the sum is 17.

The square root of 1311331112 is about 36212.3060850866. The cubic root of 1311331112 is about 1094.5546619371.

Adding to 1311331112 its reverse (2111331131), we get a palindrome (3422662243).

The spelling of 1311331112 in words is "one billion, three hundred eleven million, three hundred thirty-one thousand, one hundred twelve".