133213212 has 36 divisors (see below), whose sum is σ = 367346616. Its totient is φ = 40367520.

The previous prime is 133213189. The next prime is 133213229. The reversal of 133213212 is 212312331.

133213212 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 167803 + ... + 168594.

Almost surely, 2^133213212 is an apocalyptic number.

133213212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

133213212 is an abundant number, since it is smaller than the sum of its proper divisors (234133404).

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

133213212 is a wasteful number, since it uses less digits than its factorization.

133213212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336418 (or 336413 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 133213212 is about 11541.8028054546. The cubic root of 133213212 is about 510.7194919831.

Adding to 133213212 its reverse (212312331), we get a palindrome (345525543).

The spelling of 133213212 in words is "one hundred thirty-three million, two hundred thirteen thousand, two hundred twelve".