21202120222223 has 2 divisors, whose sum is σ = 21202120222224. Its totient is φ = 21202120222222.

The previous prime is 21202120222193. The next prime is 21202120222247. The reversal of 21202120222223 is 32222202120212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21202120222223 - 2¹⁴ = 21202120205839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21202120252223) 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, 10601060111111 + 10601060111112.

It is an arithmetic number, because the mean of its divisors is an integer number (10601060111112).

Almost surely, 2^{21202120222223} is an apocalyptic number.

21202120222223 is a deficient number, since it is larger than the sum of its proper divisors (1).

21202120222223 is an equidigital number, since it uses as much as digits as its factorization.

21202120222223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 21202120222223 its reverse (32222202120212), we get a palindrome (53424322342435).

The spelling of 21202120222223 in words is "twenty-one trillion, two hundred two billion, one hundred twenty million, two hundred twenty-two thousand, two hundred twenty-three".