131112311 has 4 divisors (see below), whose sum is σ = 143031624. Its totient is φ = 119193000.

The previous prime is 131112283. The next prime is 131112323. The reversal of 131112311 is 113211131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131112311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131112341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5959640 + ... + 5959661.

It is an arithmetic number, because the mean of its divisors is an integer number (35757906).

Almost surely, 2^131112311 is an apocalyptic number.

131112311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

131112311 is a deficient number, since it is larger than the sum of its proper divisors (11919313).

131112311 is a wasteful number, since it uses less digits than its factorization.

131112311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11919312.

The product of its digits is 18, while the sum is 14.

The square root of 131112311 is about 11450.4284199326. The cubic root of 131112311 is about 508.0204062628.

Adding to 131112311 its reverse (113211131), we get a palindrome (244323442).

It can be divided in two parts, 1311 and 12311, that multiplied together give a triangular number (16139721 = T₅₆₈₁).

The spelling of 131112311 in words is "one hundred thirty-one million, one hundred twelve thousand, three hundred eleven".