1311242321166 has 32 divisors (see below), whose sum is σ = 2732432572800. Its totient is φ = 418972979040.

The previous prime is 1311242321159. The next prime is 1311242321209. The reversal of 1311242321166 is 6611232421131.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27083280 + ... + 27131651.

It is an arithmetic number, because the mean of its divisors is an integer number (85388517900).

Almost surely, 2^{1311242321166} is an apocalyptic number.

1311242321166 is an abundant number, since it is smaller than the sum of its proper divisors (1421190251634).

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

1311242321166 is a wasteful number, since it uses less digits than its factorization.

1311242321166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54215104.

The product of its digits is 10368, while the sum is 33.

Adding to 1311242321166 its reverse (6611232421131), we get a palindrome (7922474742297).

The spelling of 1311242321166 in words is "one trillion, three hundred eleven billion, two hundred forty-two million, three hundred twenty-one thousand, one hundred sixty-six".