210021210111223 has 6 divisors (see below), whose sum is σ = 244310387272296. Its totient is φ = 180018180095292.

The previous prime is 210021210111161. The next prime is 210021210111347. The reversal of 210021210111223 is 322111012120012.

It is not a de Polignac number, because 210021210111223 - 2⁹ = 210021210110711 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 210021210111223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210021210117223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2143073572515 + ... + 2143073572612.

It is an arithmetic number, because the mean of its divisors is an integer number (40718397878716).

Almost surely, 2^{210021210111223} is an apocalyptic number.

210021210111223 is a deficient number, since it is larger than the sum of its proper divisors (34289177161073).

210021210111223 is an equidigital number, since it uses as much as digits as its factorization.

210021210111223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4286147145141 (or 4286147145134 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 210021210111223 its reverse (322111012120012), we get a palindrome (532132222231235).

The spelling of 210021210111223 in words is "two hundred ten trillion, twenty-one billion, two hundred ten million, one hundred eleven thousand, two hundred twenty-three".