221130133 has 16 divisors (see below), whose sum is σ = 261936000. Its totient is φ = 182653632.

The previous prime is 221130127. The next prime is 221130149. The reversal of 221130133 is 331031122.

It is not a de Polignac number, because 221130133 - 2²⁵ = 187575701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221130103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 206323 + ... + 207391.

It is an arithmetic number, because the mean of its divisors is an integer number (16371000).

Almost surely, 2^221130133 is an apocalyptic number.

It is an amenable number.

221130133 is a deficient number, since it is larger than the sum of its proper divisors (40805867).

221130133 is a wasteful number, since it uses less digits than its factorization.

221130133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2124.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 221130133 is about 14870.4449496308. Note that the first 3 decimals coincide. The cubic root of 221130133 is about 604.7130055139.

Adding to 221130133 its reverse (331031122), we get a palindrome (552161255).

The spelling of 221130133 in words is "two hundred twenty-one million, one hundred thirty thousand, one hundred thirty-three".