131212 has 6 divisors (see below), whose sum is σ = 229628. Its totient is φ = 65604.

The previous prime is 131203. The next prime is 131213. The reversal of 131212 is 212131.

It is a d-powerful number, because it can be written as 1 + 3² + 2⁷ + 1 + 1 + 2¹⁷ .

It is not an unprimeable number, because it can be changed into a prime (131213) by changing a digit.

131212 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16398 + ... + 16405.

2¹³¹²¹² is an apocalyptic number.

It is an amenable number.

131212 is a deficient number, since it is larger than the sum of its proper divisors (98416).

131212 is a wasteful number, since it uses less digits than its factorization.

131212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32807 (or 32805 counting only the distinct ones).

The product of its digits is 12, while the sum is 10.

The square root of 131212 is about 362.2319698757. The cubic root of 131212 is about 50.8149128516.

Adding to 131212 its reverse (212131), we get a palindrome (343343).

It can be divided in two parts, 131 and 212, that multiplied together give a palindrome (27772).

The spelling of 131212 in words is "one hundred thirty-one thousand, two hundred twelve".