133100221212 has 72 divisors (see below), whose sum is σ = 394903987296. Its totient is φ = 37000831104.

The previous prime is 133100221193. The next prime is 133100221217. The reversal of 133100221212 is 212122001331.

133100221212 is a `hidden beast` number, since 133 + 100 + 221 + 212 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133100221217) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7128183 + ... + 7146830.

Almost surely, 2^133100221212 is an apocalyptic number.

133100221212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

133100221212 is an abundant number, since it is smaller than the sum of its proper divisors (261803766084).

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

133100221212 is a wasteful number, since it uses less digits than its factorization.

133100221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14275067 (or 14275062 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 133100221212 its reverse (212122001331), we get a palindrome (345222222543).

The spelling of 133100221212 in words is "one hundred thirty-three billion, one hundred million, two hundred twenty-one thousand, two hundred twelve".