131123112 has 16 divisors (see below), whose sum is σ = 327807840. Its totient is φ = 43707696.

The previous prime is 131123107. The next prime is 131123131. The reversal of 131123112 is 211321131.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 131123091 and 131123100.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2731708 + ... + 2731755.

It is an arithmetic number, because the mean of its divisors is an integer number (20487990).

Almost surely, 2^131123112 is an apocalyptic number.

131123112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

131123112 is an abundant number, since it is smaller than the sum of its proper divisors (196684728).

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

131123112 is a wasteful number, since it uses less digits than its factorization.

131123112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5463472 (or 5463468 counting only the distinct ones).

The product of its digits is 36, while the sum is 15.

The square root of 131123112 is about 11450.9000519610. The cubic root of 131123112 is about 508.0343560785.

Adding to 131123112 its reverse (211321131), we get a palindrome (342444243).

The spelling of 131123112 in words is "one hundred thirty-one million, one hundred twenty-three thousand, one hundred twelve".