133212212 has 24 divisors (see below), whose sum is σ = 267309504. Its totient is φ = 56901312.

The previous prime is 133212203. The next prime is 133212229. The reversal of 133212212 is 212212331.

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 848 + ... + 16344.

It is an arithmetic number, because the mean of its divisors is an integer number (11137896).

Almost surely, 2^133212212 is an apocalyptic number.

It is an amenable number.

133212212 is an abundant number, since it is smaller than the sum of its proper divisors (134097292).

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

133212212 is a wasteful number, since it uses less digits than its factorization.

133212212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15815 (or 15813 counting only the distinct ones).

The product of its digits is 144, while the sum is 17.

The square root of 133212212 is about 11541.7594845847. The cubic root of 133212212 is about 510.7182140298.

Adding to 133212212 its reverse (212212331), we get a palindrome (345424543).

The spelling of 133212212 in words is "one hundred thirty-three million, two hundred twelve thousand, two hundred twelve".