210201221101 has 4 divisors (see below), whose sum is σ = 217449539100. Its totient is φ = 202952903104.

The previous prime is 210201221003. The next prime is 210201221119. The reversal of 210201221101 is 101122102012.

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 79698936100 + 130502285001 = 282310^2 + 361251^2 .

It is a cyclic number.

It is not a de Polignac number, because 210201221101 - 2³¹ = 208053737453 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 (210201221201) 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, 3624158956 + ... + 3624159013.

It is an arithmetic number, because the mean of its divisors is an integer number (54362384775).

Almost surely, 2^210201221101 is an apocalyptic number.

It is an amenable number.

210201221101 is a deficient number, since it is larger than the sum of its proper divisors (7248317999).

210201221101 is an equidigital number, since it uses as much as digits as its factorization.

210201221101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7248317998.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 210201221101 its reverse (101122102012), we get a palindrome (311323323113).

The spelling of 210201221101 in words is "two hundred ten billion, two hundred one million, two hundred twenty-one thousand, one hundred one".