133168221 has 12 divisors (see below), whose sum is σ = 192497760. Its totient is φ = 88712520.

The previous prime is 133168199. The next prime is 133168253. The reversal of 133168221 is 122861331.

It is a happy number.

It is not a de Polignac number, because 133168221 - 2⁹ = 133167709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133168421) 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, 9286 + ... + 18776.

It is an arithmetic number, because the mean of its divisors is an integer number (16041480).

Almost surely, 2^133168221 is an apocalyptic number.

It is an amenable number.

133168221 is a deficient number, since it is larger than the sum of its proper divisors (59329539).

133168221 is a wasteful number, since it uses less digits than its factorization.

133168221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11056 (or 11053 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 133168221 is about 11539.8535952585. The cubic root of 133168221 is about 510.6619892584.

The spelling of 133168221 in words is "one hundred thirty-three million, one hundred sixty-eight thousand, two hundred twenty-one".