221412223 has 2 divisors, whose sum is σ = 221412224. Its totient is φ = 221412222.

The previous prime is 221412197. The next prime is 221412241. The reversal of 221412223 is 322214122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221412223 - 2⁹ = 221411711 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221412223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221412523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110706111 + 110706112.

It is an arithmetic number, because the mean of its divisors is an integer number (110706112).

Almost surely, 2^221412223 is an apocalyptic number.

221412223 is a deficient number, since it is larger than the sum of its proper divisors (1).

221412223 is an equidigital number, since it uses as much as digits as its factorization.

221412223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 384, while the sum is 19.

The square root of 221412223 is about 14879.9268479385. The cubic root of 221412223 is about 604.9700351710.

Adding to 221412223 its reverse (322214122), we get a palindrome (543626345).

The spelling of 221412223 in words is "two hundred twenty-one million, four hundred twelve thousand, two hundred twenty-three".