1311000031320 has 192 divisors, whose sum is σ = 4686711775200. Its totient is φ = 292348385280.

The previous prime is 1311000031301. The next prime is 1311000031391. The reversal of 1311000031320 is 231300001131.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1311000031320.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2477935 + ... + 2960094.

Almost surely, 2^{1311000031320} is an apocalyptic number.

1311000031320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311000031320 is an abundant number, since it is smaller than the sum of its proper divisors (3375711743880).

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

1311000031320 is a wasteful number, since it uses less digits than its factorization.

1311000031320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5438098 (or 5438087 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 1311000031320 its reverse (231300001131), we get a palindrome (1542300032451).

The spelling of 1311000031320 in words is "one trillion, three hundred eleven billion, thirty-one thousand, three hundred twenty".