221102231 has 16 divisors (see below), whose sum is σ = 256338240. Its totient is φ = 186796800.

The previous prime is 221102227. The next prime is 221102251. The reversal of 221102231 is 132201122.

It is a happy number.

221102231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 221102231 - 2² = 221102227 is a prime.

It is a super-2 number, since 2×221102231² = 97772393106354722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221102251) 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, 195275 + ... + 196403.

It is an arithmetic number, because the mean of its divisors is an integer number (16021140).

Almost surely, 2^221102231 is an apocalyptic number.

221102231 is a deficient number, since it is larger than the sum of its proper divisors (35236009).

221102231 is a wasteful number, since it uses less digits than its factorization.

221102231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1514.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 221102231 is about 14869.5067503936. The cubic root of 221102231 is about 604.6875703975.

Adding to 221102231 its reverse (132201122), we get a palindrome (353303353).

The spelling of 221102231 in words is "two hundred twenty-one million, one hundred two thousand, two hundred thirty-one".