212103030221 has 4 divisors (see below), whose sum is σ = 212508581472. Its totient is φ = 211697478972.

The previous prime is 212103030151. The next prime is 212103030289. The reversal of 212103030221 is 122030301212.

212103030221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212103030221 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 212103030221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212103230221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202774841 + ... + 202775886.

It is an arithmetic number, because the mean of its divisors is an integer number (53127145368).

Almost surely, 2^212103030221 is an apocalyptic number.

It is an amenable number.

212103030221 is a deficient number, since it is larger than the sum of its proper divisors (405551251).

212103030221 is an equidigital number, since it uses as much as digits as its factorization.

212103030221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405551250.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 212103030221 its reverse (122030301212), we get a palindrome (334133331433).

The spelling of 212103030221 in words is "two hundred twelve billion, one hundred three million, thirty thousand, two hundred twenty-one".