210201200221 has 4 divisors (see below), whose sum is σ = 217449517500. Its totient is φ = 202952882944.

The previous prime is 210201200219. The next prime is 210201200227. The reversal of 210201200221 is 122002102012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 142528900900 + 67672299321 = 377530^2 + 260139^2 .

It is a cyclic number.

It is not a de Polignac number, because 210201200221 - 2¹ = 210201200219 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 (210201200227) 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, 3624158596 + ... + 3624158653.

It is an arithmetic number, because the mean of its divisors is an integer number (54362379375).

Almost surely, 2^210201200221 is an apocalyptic number.

It is an amenable number.

210201200221 is a deficient number, since it is larger than the sum of its proper divisors (7248317279).

210201200221 is an equidigital number, since it uses as much as digits as its factorization.

210201200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7248317278.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 210201200221 its reverse (122002102012), we get a palindrome (332203302233).

The spelling of 210201200221 in words is "two hundred ten billion, two hundred one million, two hundred thousand, two hundred twenty-one".