1321331311144 has 32 divisors (see below), whose sum is σ = 2724840357120. Its totient is φ = 596869788096.

The previous prime is 1321331311061. The next prime is 1321331311159. The reversal of 1321331311144 is 4411131331231.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135155844 + ... + 135165619.

It is an arithmetic number, because the mean of its divisors is an integer number (85151261160).

Almost surely, 2^{1321331311144} is an apocalyptic number.

It is an amenable number.

1321331311144 is an abundant number, since it is smaller than the sum of its proper divisors (1403509045976).

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

1321331311144 is a wasteful number, since it uses less digits than its factorization.

1321331311144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270321529 (or 270321525 counting only the distinct ones).

The product of its digits is 2592, while the sum is 28.

Adding to 1321331311144 its reverse (4411131331231), we get a palindrome (5732462642375).

The spelling of 1321331311144 in words is "one trillion, three hundred twenty-one billion, three hundred thirty-one million, three hundred eleven thousand, one hundred forty-four".