1311440131444 has 48 divisors (see below), whose sum is σ = 2352584424960. Its totient is φ = 639328757760.

The previous prime is 1311440131357. The next prime is 1311440131481. The reversal of 1311440131444 is 4441310441131.

It is a happy number.

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, 321981792 + ... + 321985864.

It is an arithmetic number, because the mean of its divisors is an integer number (49012175520).

Almost surely, 2^{1311440131444} is an apocalyptic number.

It is an amenable number.

1311440131444 is a deficient number, since it is larger than the sum of its proper divisors (1041144293516).

1311440131444 is a wasteful number, since it uses less digits than its factorization.

1311440131444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7000 (or 6998 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

Adding to 1311440131444 its reverse (4441310441131), we get a palindrome (5752750572575).

The spelling of 1311440131444 in words is "one trillion, three hundred eleven billion, four hundred forty million, one hundred thirty-one thousand, four hundred forty-four".