221134223 has 2 divisors, whose sum is σ = 221134224. Its totient is φ = 221134222.

The previous prime is 221134153. The next prime is 221134241. The reversal of 221134223 is 322431122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221134223 - 2¹² = 221130127 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221134195 and 221134204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221134723) 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 as a sum of consecutive naturals, namely, 110567111 + 110567112.

It is an arithmetic number, because the mean of its divisors is an integer number (110567112).

Almost surely, 2^221134223 is an apocalyptic number.

221134223 is a deficient number, since it is larger than the sum of its proper divisors (1).

221134223 is an equidigital number, since it uses as much as digits as its factorization.

221134223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 20.

The square root of 221134223 is about 14870.5824700985. The cubic root of 221134223 is about 604.7167337272.

Adding to 221134223 its reverse (322431122), we get a palindrome (543565345).

The spelling of 221134223 in words is "two hundred twenty-one million, one hundred thirty-four thousand, two hundred twenty-three".