212100223 has 4 divisors (see below), whose sum is σ = 216102168. Its totient is φ = 208098280.

The previous prime is 212100193. The next prime is 212100241. The reversal of 212100223 is 322001212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212100223 - 2⁵ = 212100191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212100263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2000893 + ... + 2000998.

It is an arithmetic number, because the mean of its divisors is an integer number (54025542).

Almost surely, 2^212100223 is an apocalyptic number.

212100223 is a deficient number, since it is larger than the sum of its proper divisors (4001945).

212100223 is an equidigital number, since it uses as much as digits as its factorization.

212100223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4001944.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 212100223 is about 14563.6610438447. The cubic root of 212100223 is about 596.3671436891.

Adding to 212100223 its reverse (322001212), we get a palindrome (534101435).

The spelling of 212100223 in words is "two hundred twelve million, one hundred thousand, two hundred twenty-three".