211303230221 has 4 divisors (see below), whose sum is σ = 211759609152. Its totient is φ = 210846851292.

The previous prime is 211303230211. The next prime is 211303230247. The reversal of 211303230221 is 122032303112.

211303230221 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 not a de Polignac number, because 211303230221 - 2⁶ = 211303230157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211303230193 and 211303230202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211303230211) 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, 228188771 + ... + 228189696.

It is an arithmetic number, because the mean of its divisors is an integer number (52939902288).

Almost surely, 2^211303230221 is an apocalyptic number.

It is an amenable number.

211303230221 is a deficient number, since it is larger than the sum of its proper divisors (456378931).

211303230221 is an equidigital number, since it uses as much as digits as its factorization.

211303230221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456378930.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 211303230221 its reverse (122032303112), we get a palindrome (333335533333).

The spelling of 211303230221 in words is "two hundred eleven billion, three hundred three million, two hundred thirty thousand, two hundred twenty-one".