210221200220201 has 4 divisors (see below), whose sum is σ = 219361252403712. Its totient is φ = 201081148036692.

The previous prime is 210221200220189. The next prime is 210221200220281. The reversal of 210221200220201 is 102022002122012.

It is a happy number.

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 210221200220201 - 2²⁶ = 210221133111337 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 210221200220201.

It is not an unprimeable number, because it can be changed into a prime (210221200220281) 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, 4570026091721 + ... + 4570026091766.

It is an arithmetic number, because the mean of its divisors is an integer number (54840313100928).

Almost surely, 2^{210221200220201} is an apocalyptic number.

It is an amenable number.

210221200220201 is a deficient number, since it is larger than the sum of its proper divisors (9140052183511).

210221200220201 is an equidigital number, since it uses as much as digits as its factorization.

210221200220201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9140052183510.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 210221200220201 its reverse (102022002122012), we get a palindrome (312243202342213).

The spelling of 210221200220201 in words is "two hundred ten trillion, two hundred twenty-one billion, two hundred million, two hundred twenty thousand, two hundred one".