211321223 has 2 divisors, whose sum is σ = 211321224. Its totient is φ = 211321222.

The previous prime is 211321213. The next prime is 211321241. The reversal of 211321223 is 322123112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211321223 - 2⁴ = 211321207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211321213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105660611 + 105660612.

It is an arithmetic number, because the mean of its divisors is an integer number (105660612).

Almost surely, 2^211321223 is an apocalyptic number.

211321223 is a deficient number, since it is larger than the sum of its proper divisors (1).

211321223 is an equidigital number, since it uses as much as digits as its factorization.

211321223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144, while the sum is 17.

The square root of 211321223 is about 14536.8917929522. The cubic root of 211321223 is about 595.6361371896.

Adding to 211321223 its reverse (322123112), we get a palindrome (533444335).

The spelling of 211321223 in words is "two hundred eleven million, three hundred twenty-one thousand, two hundred twenty-three".