133220211 has 16 divisors (see below), whose sum is σ = 190729728. Its totient is φ = 82409600.

The previous prime is 133220189. The next prime is 133220249. The reversal of 133220211 is 112022331.

It is a cyclic number.

It is not a de Polignac number, because 133220211 - 2⁶ = 133220147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133220251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14775 + ... + 22016.

It is an arithmetic number, because the mean of its divisors is an integer number (11920608).

Almost surely, 2^133220211 is an apocalyptic number.

133220211 is a deficient number, since it is larger than the sum of its proper divisors (57509517).

133220211 is a wasteful number, since it uses less digits than its factorization.

133220211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36882.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 133220211 is about 11542.1060036719. The cubic root of 133220211 is about 510.7284361988.

Adding to 133220211 its reverse (112022331), we get a palindrome (245242542).

The spelling of 133220211 in words is "one hundred thirty-three million, two hundred twenty thousand, two hundred eleven".