1311253131166 has 16 divisors (see below), whose sum is σ = 2145784919040. Its totient is φ = 595996934680.

The previous prime is 1311253131137. The next prime is 1311253131187. The reversal of 1311253131166 is 6611313521131.

It is a congruent number.

It is an unprimeable number.

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, 864016 + ... + 1835491.

It is an arithmetic number, because the mean of its divisors is an integer number (134111557440).

Almost surely, 2^{1311253131166} is an apocalyptic number.

1311253131166 is a deficient number, since it is larger than the sum of its proper divisors (834531787874).

1311253131166 is a wasteful number, since it uses less digits than its factorization.

1311253131166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2721599.

The product of its digits is 9720, while the sum is 34.

Adding to 1311253131166 its reverse (6611313521131), we get a palindrome (7922566652297).

The spelling of 1311253131166 in words is "one trillion, three hundred eleven billion, two hundred fifty-three million, one hundred thirty-one thousand, one hundred sixty-six".