133333204221 has 20 divisors (see below), whose sum is σ = 227630585952. Its totient is φ = 76190402088.

The previous prime is 133333204171. The next prime is 133333204223. The reversal of 133333204221 is 122402333331.

133333204221 is a `hidden beast` number, since 1 + 3 + 333 + 320 + 4 + 2 + 2 + 1 = 666.

It is not a de Polignac number, because 133333204221 - 2¹⁴ = 133333187837 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133333204223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 117577215 + ... + 117578348.

Almost surely, 2^133333204221 is an apocalyptic number.

It is an amenable number.

133333204221 is a deficient number, since it is larger than the sum of its proper divisors (94297381731).

133333204221 is an equidigital number, since it uses as much as digits as its factorization.

133333204221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235155582 (or 235155573 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 27.

Adding to 133333204221 its reverse (122402333331), we get a palindrome (255735537552).

The spelling of 133333204221 in words is "one hundred thirty-three billion, three hundred thirty-three million, two hundred four thousand, two hundred twenty-one".