212101223 has 2 divisors, whose sum is σ = 212101224. Its totient is φ = 212101222.

The previous prime is 212101207. The next prime is 212101229. The reversal of 212101223 is 322101212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212101223 - 2⁴ = 212101207 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212101198 and 212101207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212101229) 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, 106050611 + 106050612.

It is an arithmetic number, because the mean of its divisors is an integer number (106050612).

Almost surely, 2^212101223 is an apocalyptic number.

212101223 is a deficient number, since it is larger than the sum of its proper divisors (1).

212101223 is an equidigital number, since it uses as much as digits as its factorization.

212101223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 212101223 is about 14563.6953758310. The cubic root of 212101223 is about 596.3680809287.

Adding to 212101223 its reverse (322101212), we get a palindrome (534202435).

The spelling of 212101223 in words is "two hundred twelve million, one hundred one thousand, two hundred twenty-three".