210221001223 has 2 divisors, whose sum is σ = 210221001224. Its totient is φ = 210221001222.

The previous prime is 210221001209. The next prime is 210221001227. The reversal of 210221001223 is 322100122012.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 210221001223 - 2²⁹ = 209684130311 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210221001197 and 210221001206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210221001227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105110500611 + 105110500612.

It is an arithmetic number, because the mean of its divisors is an integer number (105110500612).

Almost surely, 2^210221001223 is an apocalyptic number.

210221001223 is a deficient number, since it is larger than the sum of its proper divisors (1).

210221001223 is an equidigital number, since it uses as much as digits as its factorization.

210221001223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 210221001223 its reverse (322100122012), we get a palindrome (532321123235).

The spelling of 210221001223 in words is "two hundred ten billion, two hundred twenty-one million, one thousand, two hundred twenty-three".