1311561301332 has 48 divisors (see below), whose sum is σ = 3084932692800. Its totient is φ = 433681478400.

The previous prime is 1311561301207. The next prime is 1311561301381. The reversal of 1311561301332 is 2331031651131.

It is a self number, because there is not a number n which added to its sum of digits gives 1311561301332.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132082 + ... + 1624982.

It is an arithmetic number, because the mean of its divisors is an integer number (64269431100).

Almost surely, 2^{1311561301332} is an apocalyptic number.

1311561301332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1311561301332 is an abundant number, since it is smaller than the sum of its proper divisors (1773371391468).

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

1311561301332 is a wasteful number, since it uses less digits than its factorization.

1311561301332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1493496 (or 1493494 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 30.

Adding to 1311561301332 its reverse (2331031651131), we get a palindrome (3642592952463).

The spelling of 1311561301332 in words is "one trillion, three hundred eleven billion, five hundred sixty-one million, three hundred one thousand, three hundred thirty-two".