1311311023320 has 64 divisors (see below), whose sum is σ = 3934843787520. Its totient is φ = 349601986944.

The previous prime is 1311311023301. The next prime is 1311311023339. The reversal of 1311311023320 is 233201131131.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1311311023301) and next prime (1311311023339).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 743482 + ... + 1781961.

It is an arithmetic number, because the mean of its divisors is an integer number (61481934180).

Almost surely, 2^{1311311023320} is an apocalyptic number.

1311311023320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311311023320 is an abundant number, since it is smaller than the sum of its proper divisors (2623532764200).

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

1311311023320 is a wasteful number, since it uses less digits than its factorization.

1311311023320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2529784 (or 2529780 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 1311311023320 its reverse (233201131131), we get a palindrome (1544512154451).

The spelling of 1311311023320 in words is "one trillion, three hundred eleven billion, three hundred eleven million, twenty-three thousand, three hundred twenty".