221330211 has 8 divisors (see below), whose sum is σ = 297972480. Its totient is φ = 146120712.

The previous prime is 221330201. The next prime is 221330231. The reversal of 221330211 is 112033122.

221330211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 221330211 - 2⁶ = 221330147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221330201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 357831 + ... + 358448.

It is an arithmetic number, because the mean of its divisors is an integer number (37246560).

Almost surely, 2^221330211 is an apocalyptic number.

221330211 is a deficient number, since it is larger than the sum of its proper divisors (76642269).

221330211 is a wasteful number, since it uses less digits than its factorization.

221330211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716385.

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

The square root of 221330211 is about 14877.1707995842. The cubic root of 221330211 is about 604.8953314818.

Adding to 221330211 its reverse (112033122), we get a palindrome (333363333).

The spelling of 221330211 in words is "two hundred twenty-one million, three hundred thirty thousand, two hundred eleven".