212021100223 has 4 divisors (see below), whose sum is σ = 216951823528. Its totient is φ = 207090376920.

The previous prime is 212021100173. The next prime is 212021100253. The reversal of 212021100223 is 322001120212.

It is a happy number.

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 212021100223 - 2¹⁷ = 212020969151 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212021100197 and 212021100206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021100253) 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, 2465361588 + ... + 2465361673.

It is an arithmetic number, because the mean of its divisors is an integer number (54237955882).

Almost surely, 2^212021100223 is an apocalyptic number.

212021100223 is a deficient number, since it is larger than the sum of its proper divisors (4930723305).

212021100223 is an equidigital number, since it uses as much as digits as its factorization.

212021100223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4930723304.

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

Adding to 212021100223 its reverse (322001120212), we get a palindrome (534022220435).

The spelling of 212021100223 in words is "two hundred twelve billion, twenty-one million, one hundred thousand, two hundred twenty-three".