212113230221 has 4 divisors (see below), whose sum is σ = 214668811392. Its totient is φ = 209557649052.

The previous prime is 212113230187. The next prime is 212113230223. The reversal of 212113230221 is 122032311212.

212113230221 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 212113230221 - 2⁶ = 212113230157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212113230193 and 212113230202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212113230223) 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, 1277790461 + ... + 1277790626.

It is an arithmetic number, because the mean of its divisors is an integer number (53667202848).

Almost surely, 2^212113230221 is an apocalyptic number.

It is an amenable number.

212113230221 is a deficient number, since it is larger than the sum of its proper divisors (2555581171).

212113230221 is an equidigital number, since it uses as much as digits as its factorization.

212113230221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2555581170.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 212113230221 its reverse (122032311212), we get a palindrome (334145541433).

The spelling of 212113230221 in words is "two hundred twelve billion, one hundred thirteen million, two hundred thirty thousand, two hundred twenty-one".