1311303313320 has 256 divisors, whose sum is σ = 5281893550080. Its totient is φ = 251518694400.

The previous prime is 1311303313279. The next prime is 1311303313337. The reversal of 1311303313320 is 233133031131.

It is a super-3 number, since 3×1311303313320³ (a number of 37 digits) contains 333 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5338186 + ... + 5578425.

It is an arithmetic number, because the mean of its divisors is an integer number (20632396680).

Almost surely, 2^{1311303313320} is an apocalyptic number.

1311303313320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311303313320 is an abundant number, since it is smaller than the sum of its proper divisors (3970590236760).

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

1311303313320 is a wasteful number, since it uses less digits than its factorization.

1311303313320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10916656 (or 10916652 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 24.

Adding to 1311303313320 its reverse (233133031131), we get a palindrome (1544436344451).

The spelling of 1311303313320 in words is "one trillion, three hundred eleven billion, three hundred three million, three hundred thirteen thousand, three hundred twenty".