213021223 has 2 divisors, whose sum is σ = 213021224. Its totient is φ = 213021222.

The previous prime is 213021191. The next prime is 213021251. The reversal of 213021223 is 322120312.

213021223 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213021223 - 2⁵ = 213021191 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213021197 and 213021206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213021283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106510611 + 106510612.

It is an arithmetic number, because the mean of its divisors is an integer number (106510612).

Almost surely, 2^213021223 is an apocalyptic number.

213021223 is a deficient number, since it is larger than the sum of its proper divisors (1).

213021223 is an equidigital number, since it uses as much as digits as its factorization.

213021223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 213021223 is about 14595.2465892153. The cubic root of 213021223 is about 597.2290963351.

Adding to 213021223 its reverse (322120312), we get a palindrome (535141535).

The spelling of 213021223 in words is "two hundred thirteen million, twenty-one thousand, two hundred twenty-three".