221324023 has 2 divisors, whose sum is σ = 221324024. Its totient is φ = 221324022.

The previous prime is 221324021. The next prime is 221324057. The reversal of 221324023 is 320423122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221324023 - 2¹ = 221324021 is a prime.

Together with 221324021, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221324021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110662011 + 110662012.

It is an arithmetic number, because the mean of its divisors is an integer number (110662012).

Almost surely, 2^221324023 is an apocalyptic number.

221324023 is a deficient number, since it is larger than the sum of its proper divisors (1).

221324023 is an equidigital number, since it uses as much as digits as its factorization.

221324023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 221324023 is about 14876.9628284808. The cubic root of 221324023 is about 604.8896941626.

Adding to 221324023 its reverse (320423122), we get a palindrome (541747145).

Subtracting 221324023 from its reverse (320423122), we obtain a palindrome (99099099).

The spelling of 221324023 in words is "two hundred twenty-one million, three hundred twenty-four thousand, twenty-three".