1311323142312 has 24 divisors (see below), whose sum is σ = 3551500177290. Its totient is φ = 437107714080.

The previous prime is 1311323142307. The next prime is 1311323142331. The reversal of 1311323142312 is 2132413231131.

1311323142312 is a `hidden beast` number, since 1 + 3 + 1 + 1 + 3 + 231 + 423 + 1 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1222116984036 + 89206158276 = 1105494^2 + 298674^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9106410639 + ... + 9106410782.

Almost surely, 2^{1311323142312} is an apocalyptic number.

1311323142312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1311323142312 is an abundant number, since it is smaller than the sum of its proper divisors (2240177034978).

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

1311323142312 is a wasteful number, since it uses less digits than its factorization.

1311323142312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18212821433 (or 18212821426 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

Adding to 1311323142312 its reverse (2132413231131), we get a palindrome (3443736373443).

The spelling of 1311323142312 in words is "one trillion, three hundred eleven billion, three hundred twenty-three million, one hundred forty-two thousand, three hundred twelve".