221101223 has 4 divisors (see below), whose sum is σ = 252687120. Its totient is φ = 189515328.

The previous prime is 221101219. The next prime is 221101247. The reversal of 221101223 is 322101122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221101223 - 2² = 221101219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221101198 and 221101207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221101253) 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 3 ways as a sum of consecutive naturals, for example, 15792938 + ... + 15792951.

It is an arithmetic number, because the mean of its divisors is an integer number (63171780).

Almost surely, 2^221101223 is an apocalyptic number.

221101223 is a deficient number, since it is larger than the sum of its proper divisors (31585897).

221101223 is an equidigital number, since it uses as much as digits as its factorization.

221101223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31585896.

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

The square root of 221101223 is about 14869.4728554848. The cubic root of 221101223 is about 604.6866514772.

Adding to 221101223 its reverse (322101122), we get a palindrome (543202345).

The spelling of 221101223 in words is "two hundred twenty-one million, one hundred one thousand, two hundred twenty-three".