133121212 has 12 divisors (see below), whose sum is σ = 266242480. Its totient is φ = 57051936.

The previous prime is 133121189. The next prime is 133121257. The reversal of 133121212 is 212121331.

133121212 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

133121212 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2377137 + ... + 2377192.

Almost surely, 2^133121212 is an apocalyptic number.

It is an amenable number.

133121212 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

133121212 is a wasteful number, since it uses less digits than its factorization.

133121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4754340 (or 4754338 counting only the distinct ones).

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

The square root of 133121212 is about 11537.8166045400. The cubic root of 133121212 is about 510.6018935025.

Adding to 133121212 its reverse (212121331), we get a palindrome (345242543).

The spelling of 133121212 in words is "one hundred thirty-three million, one hundred twenty-one thousand, two hundred twelve".