1311032331312 has 320 divisors, whose sum is σ = 4039119575040. Its totient is φ = 362125209600.

The previous prime is 1311032331311. The next prime is 1311032331319. The reversal of 1311032331312 is 2131332301131.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (1311032331311) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 28879512 + ... + 28924872.

It is an arithmetic number, because the mean of its divisors is an integer number (12622248672).

Almost surely, 2^{1311032331312} is an apocalyptic number.

1311032331312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1311032331312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2019559787520).

1311032331312 is an abundant number, since it is smaller than the sum of its proper divisors (2728087243728).

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

1311032331312 is a wasteful number, since it uses less digits than its factorization.

1311032331312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45512 (or 45506 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 24.

Adding to 1311032331312 its reverse (2131332301131), we get a palindrome (3442364632443).

The spelling of 1311032331312 in words is "one trillion, three hundred eleven billion, thirty-two million, three hundred thirty-one thousand, three hundred twelve".