133188012 has 36 divisors (see below), whose sum is σ = 345772336. Its totient is φ = 43195680.

The previous prime is 133188001. The next prime is 133188017. The reversal of 133188012 is 210881331.

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

It is not an unprimeable number, because it can be changed into a prime (133188017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48664 + ... + 51327.

Almost surely, 2^133188012 is an apocalyptic number.

133188012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

133188012 is an abundant number, since it is smaller than the sum of its proper divisors (212584324).

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

133188012 is a wasteful number, since it uses less digits than its factorization.

133188012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100038 (or 100033 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 133188012 is about 11540.7110699471. The cubic root of 133188012 is about 510.6872856110.

The spelling of 133188012 in words is "one hundred thirty-three million, one hundred eighty-eight thousand, twelve".