1311304520000 has 280 divisors, whose sum is σ = 3592613445696. Its totient is φ = 472198144000.

The previous prime is 1311304519963. The next prime is 1311304520021. The reversal of 1311304520000 is 254031131.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 15598079 + ... + 15681921.

Almost surely, 2^{1311304520000} is an apocalyptic number.

1311304520000 is a gapful number since it is divisible by the number (10) 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 1311304520000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1796306722848).

1311304520000 is an abundant number, since it is smaller than the sum of its proper divisors (2281308925696).

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

1311304520000 is an equidigital number, since it uses as much as digits as its factorization.

1311304520000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83915 (or 83890 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

Adding to 1311304520000 its reverse (254031131), we get a palindrome (1311558551131).

The spelling of 1311304520000 in words is "one trillion, three hundred eleven billion, three hundred four million, five hundred twenty thousand".