133131212 has 12 divisors (see below), whose sum is σ = 233075136. Its totient is φ = 66538320.

The previous prime is 133131209. The next prime is 133131227. The reversal of 133131212 is 212131331.

133131212 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

133131212 is strictly pandigital in base 9.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7493 + ... + 17955.

It is an arithmetic number, because the mean of its divisors is an integer number (19422928).

Almost surely, 2^133131212 is an apocalyptic number.

It is an amenable number.

133131212 is a deficient number, since it is larger than the sum of its proper divisors (99943924).

133131212 is a wasteful number, since it uses less digits than its factorization.

133131212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13648 (or 13646 counting only the distinct ones).

The product of its digits is 108, while the sum is 17.

The square root of 133131212 is about 11538.2499539575. The cubic root of 133131212 is about 510.6146785701.

Adding to 133131212 its reverse (212131331), we get a palindrome (345262543).

The spelling of 133131212 in words is "one hundred thirty-three million, one hundred thirty-one thousand, two hundred twelve".