210221123223 has 16 divisors (see below), whose sum is σ = 289377570816. Its totient is φ = 135645708960.

The previous prime is 210221123201. The next prime is 210221123227. The reversal of 210221123223 is 322321122012.

It is not a de Polignac number, because 210221123223 - 2²⁴ = 210204346007 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210221123223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210221123227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4936611 + ... + 4979012.

It is an arithmetic number, because the mean of its divisors is an integer number (18086098176).

Almost surely, 2^210221123223 is an apocalyptic number.

210221123223 is a deficient number, since it is larger than the sum of its proper divisors (79156447593).

210221123223 is a wasteful number, since it uses less digits than its factorization.

210221123223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9915854.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 210221123223 its reverse (322321122012), we get a palindrome (532542245235).

The spelling of 210221123223 in words is "two hundred ten billion, two hundred twenty-one million, one hundred twenty-three thousand, two hundred twenty-three".