211101200221 has 4 divisors (see below), whose sum is σ = 211279949244. Its totient is φ = 210922451200.

The previous prime is 211101200213. The next prime is 211101200227. The reversal of 211101200221 is 122002101112.

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 145981305625 + 65119894596 = 382075^2 + 255186^2 .

It is a cyclic number.

It is not a de Polignac number, because 211101200221 - 2³ = 211101200213 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 (211101200227) 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, 89372740 + ... + 89375101.

It is an arithmetic number, because the mean of its divisors is an integer number (52819987311).

Almost surely, 2^211101200221 is an apocalyptic number.

It is an amenable number.

211101200221 is a deficient number, since it is larger than the sum of its proper divisors (178749023).

211101200221 is a wasteful number, since it uses less digits than its factorization.

211101200221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178749022.

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

Adding to 211101200221 its reverse (122002101112), we get a palindrome (333103301333).

The spelling of 211101200221 in words is "two hundred eleven billion, one hundred one million, two hundred thousand, two hundred twenty-one".