1311440331342 has 16 divisors (see below), whose sum is σ = 2637533629440. Its totient is φ = 434704615992.

The previous prime is 1311440331211. The next prime is 1311440331349. The reversal of 1311440331342 is 2431330441131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311440331349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 610539118 + ... + 610541265.

It is an arithmetic number, because the mean of its divisors is an integer number (164845851840).

Almost surely, 2^{1311440331342} is an apocalyptic number.

1311440331342 is an abundant number, since it is smaller than the sum of its proper divisors (1326093298098).

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

1311440331342 is a wasteful number, since it uses less digits than its factorization.

1311440331342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1221080567.

The product of its (nonzero) digits is 10368, while the sum is 30.

Adding to 1311440331342 its reverse (2431330441131), we get a palindrome (3742770772473).

The spelling of 1311440331342 in words is "one trillion, three hundred eleven billion, four hundred forty million, three hundred thirty-one thousand, three hundred forty-two".