121644223 has 2 divisors, whose sum is σ = 121644224. Its totient is φ = 121644222.

The previous prime is 121644209. The next prime is 121644227. The reversal of 121644223 is 322446121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121644223 - 2⁵ = 121644191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121644227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60822111 + 60822112.

It is an arithmetic number, because the mean of its divisors is an integer number (60822112).

Almost surely, 2^121644223 is an apocalyptic number.

121644223 is a deficient number, since it is larger than the sum of its proper divisors (1).

121644223 is an equidigital number, since it uses as much as digits as its factorization.

121644223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 25.

The square root of 121644223 is about 11029.2439904102. The cubic root of 121644223 is about 495.4849826233.

The spelling of 121644223 in words is "one hundred twenty-one million, six hundred forty-four thousand, two hundred twenty-three".