1312311112 has 16 divisors (see below), whose sum is σ = 2812095360. Its totient is φ = 562419024.

The previous prime is 1312311101. The next prime is 1312311137. The reversal of 1312311112 is 2111132131.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11717008 + ... + 11717119.

It is an arithmetic number, because the mean of its divisors is an integer number (175755960).

Almost surely, 2^1312311112 is an apocalyptic number.

It is an amenable number.

1312311112 is an abundant number, since it is smaller than the sum of its proper divisors (1499784248).

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

1312311112 is a wasteful number, since it uses less digits than its factorization.

1312311112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23434140 (or 23434136 counting only the distinct ones).

The product of its digits is 36, while the sum is 16.

The square root of 1312311112 is about 36225.8348696065. The cubic root of 1312311112 is about 1094.8272593657.

Adding to 1312311112 its reverse (2111132131), we get a palindrome (3423443243).

The spelling of 1312311112 in words is "one billion, three hundred twelve million, three hundred eleven thousand, one hundred twelve".