212002210221 has 4 divisors (see below), whose sum is σ = 282669613632. Its totient is φ = 141334806812.

The previous prime is 212002210187. The next prime is 212002210229. The reversal of 212002210221 is 122012200212.

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 212002210221 - 2⁶ = 212002210157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212002210221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212002210229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35333701701 + ... + 35333701706.

It is an arithmetic number, because the mean of its divisors is an integer number (70667403408).

Almost surely, 2^212002210221 is an apocalyptic number.

It is an amenable number.

212002210221 is a deficient number, since it is larger than the sum of its proper divisors (70667403411).

212002210221 is an equidigital number, since it uses as much as digits as its factorization.

212002210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70667403410.

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

Adding to 212002210221 its reverse (122012200212), we get a palindrome (334014410433).

The spelling of 212002210221 in words is "two hundred twelve billion, two million, two hundred ten thousand, two hundred twenty-one".