131212112 has 30 divisors (see below), whose sum is σ = 257047722. Its totient is φ = 64885056.

The previous prime is 131212111. The next prime is 131212183. The reversal of 131212112 is 211212131.

It can be written as a sum of positive squares in only one way, i.e., 82156096 + 49056016 = 9064^2 + 7004^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131212111) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 169358 + ... + 170130.

Almost surely, 2^131212112 is an apocalyptic number.

It is an amenable number.

131212112 is a deficient number, since it is larger than the sum of its proper divisors (125835610).

131212112 is an equidigital number, since it uses as much as digits as its factorization.

131212112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987 (or 878 counting only the distinct ones).

The product of its digits is 24, while the sum is 14.

The square root of 131212112 is about 11454.7855501533. The cubic root of 131212112 is about 508.1492730979.

Adding to 131212112 its reverse (211212131), we get a palindrome (342424243).

The spelling of 131212112 in words is "one hundred thirty-one million, two hundred twelve thousand, one hundred twelve".