133221211 has 8 divisors (see below), whose sum is σ = 134198384. Its totient is φ = 132248160.

The previous prime is 133221173. The next prime is 133221271. The reversal of 133221211 is 112122331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133221211 - 2⁹ = 133220699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133221271) 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 7 ways as a sum of consecutive naturals, for example, 90961 + ... + 92413.

It is an arithmetic number, because the mean of its divisors is an integer number (16774798).

Almost surely, 2^133221211 is an apocalyptic number.

133221211 is a deficient number, since it is larger than the sum of its proper divisors (977173).

133221211 is a wasteful number, since it uses less digits than its factorization.

133221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2061.

The product of its digits is 72, while the sum is 16.

The square root of 133221211 is about 11542.1493232413. The cubic root of 133221211 is about 510.7297141009.

Adding to 133221211 its reverse (112122331), we get a palindrome (245343542).

The spelling of 133221211 in words is "one hundred thirty-three million, two hundred twenty-one thousand, two hundred eleven".