21218482223 has 2 divisors, whose sum is σ = 21218482224. Its totient is φ = 21218482222.

The previous prime is 21218482163. The next prime is 21218482247. The reversal of 21218482223 is 32228481212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21218482223 - 2¹⁰ = 21218481199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21218482723) 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, 10609241111 + 10609241112.

It is an arithmetic number, because the mean of its divisors is an integer number (10609241112).

Almost surely, 2^21218482223 is an apocalyptic number.

21218482223 is a deficient number, since it is larger than the sum of its proper divisors (1).

21218482223 is an equidigital number, since it uses as much as digits as its factorization.

21218482223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24576, while the sum is 35.

The spelling of 21218482223 in words is "twenty-one billion, two hundred eighteen million, four hundred eighty-two thousand, two hundred twenty-three".