131223112 has 32 divisors (see below), whose sum is σ = 249361920. Its totient is φ = 64733760.

The previous prime is 131223109. The next prime is 131223149. The reversal of 131223112 is 211322131.

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 7 ways as a sum of consecutive naturals, for example, 239623 + ... + 240169.

It is an arithmetic number, because the mean of its divisors is an integer number (7792560).

Almost surely, 2^131223112 is an apocalyptic number.

It is an amenable number.

131223112 is a deficient number, since it is larger than the sum of its proper divisors (118138808).

131223112 is a wasteful number, since it uses less digits than its factorization.

131223112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901 (or 897 counting only the distinct ones).

The product of its digits is 72, while the sum is 16.

The square root of 131223112 is about 11455.2656887564. The cubic root of 131223112 is about 508.1634727164.

Adding to 131223112 its reverse (211322131), we get a palindrome (342545243).

The spelling of 131223112 in words is "one hundred thirty-one million, two hundred twenty-three thousand, one hundred twelve".