131021112 has 32 divisors (see below), whose sum is σ = 344793600. Its totient is φ = 41374944.

The previous prime is 131021071. The next prime is 131021119. The reversal of 131021112 is 211120131.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131021119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143208 + ... + 144119.

It is an arithmetic number, because the mean of its divisors is an integer number (10774800).

Almost surely, 2^131021112 is an apocalyptic number.

131021112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

131021112 is an abundant number, since it is smaller than the sum of its proper divisors (213772488).

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

131021112 is a wasteful number, since it uses less digits than its factorization.

131021112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287355 (or 287351 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 131021112 is about 11446.4453871060. The cubic root of 131021112 is about 507.9025894610.

Adding to 131021112 its reverse (211120131), we get a palindrome (342141243).

It can be divided in two parts, 1310 and 21112, that added together give a palindrome (22422).

The spelling of 131021112 in words is "one hundred thirty-one million, twenty-one thousand, one hundred twelve".