212021200221 has 8 divisors (see below), whose sum is σ = 282940120320. Its totient is φ = 141224873472.

The previous prime is 212021200207. The next prime is 212021200229. The reversal of 212021200221 is 122002120212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 212021200221 - 2⁵ = 212021200189 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 212021200221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021200229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30644301 + ... + 30651218.

It is an arithmetic number, because the mean of its divisors is an integer number (35367515040).

Almost surely, 2^212021200221 is an apocalyptic number.

It is an amenable number.

212021200221 is a deficient number, since it is larger than the sum of its proper divisors (70918920099).

212021200221 is a wasteful number, since it uses less digits than its factorization.

212021200221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61296675.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 212021200221 its reverse (122002120212), we get a palindrome (334023320433).

The spelling of 212021200221 in words is "two hundred twelve billion, twenty-one million, two hundred thousand, two hundred twenty-one".