212123203203 has 4 divisors (see below), whose sum is σ = 282830937608. Its totient is φ = 141415468800.

The previous prime is 212123203189. The next prime is 212123203247. The reversal of 212123203203 is 302302321212.

It is a happy number.

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

It is not a de Polignac number, because 212123203203 - 2⁶ = 212123203139 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 212123203203.

It is not an unprimeable number, because it can be changed into a prime (212123203273) 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, 35353867198 + ... + 35353867203.

It is an arithmetic number, because the mean of its divisors is an integer number (70707734402).

Almost surely, 2^212123203203 is an apocalyptic number.

212123203203 is a deficient number, since it is larger than the sum of its proper divisors (70707734405).

212123203203 is an equidigital number, since it uses as much as digits as its factorization.

212123203203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70707734404.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 212123203203 its reverse (302302321212), we get a palindrome (514425524415).

The spelling of 212123203203 in words is "two hundred twelve billion, one hundred twenty-three million, two hundred three thousand, two hundred three".