212430200221 has 4 divisors (see below), whose sum is σ = 215422174944. Its totient is φ = 209438225500.

The previous prime is 212430200197. The next prime is 212430200273. The reversal of 212430200221 is 122002034212.

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-212430200221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212430200291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1495987255 + ... + 1495987396.

It is an arithmetic number, because the mean of its divisors is an integer number (53855543736).

Almost surely, 2^212430200221 is an apocalyptic number.

It is an amenable number.

212430200221 is a deficient number, since it is larger than the sum of its proper divisors (2991974723).

212430200221 is an equidigital number, since it uses as much as digits as its factorization.

212430200221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2991974722.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 212430200221 its reverse (122002034212), we get a palindrome (334432234433).

The spelling of 212430200221 in words is "two hundred twelve billion, four hundred thirty million, two hundred thousand, two hundred twenty-one".