131312212 has 12 divisors (see below), whose sum is σ = 230828416. Its totient is φ = 65361240.

The previous prime is 131312201. The next prime is 131312213. The reversal of 131312212 is 212213131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131312213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72714 + ... + 74497.

Almost surely, 2^131312212 is an apocalyptic number.

It is an amenable number.

131312212 is a deficient number, since it is larger than the sum of its proper divisors (99516204).

131312212 is a wasteful number, since it uses less digits than its factorization.

131312212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147438 (or 147436 counting only the distinct ones).

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

The square root of 131312212 is about 11459.1540700001. The cubic root of 131312212 is about 508.2784603912.

Adding to 131312212 its reverse (212213131), we get a palindrome (343525343).

The spelling of 131312212 in words is "one hundred thirty-one million, three hundred twelve thousand, two hundred twelve".