221200100210221 has 8 divisors (see below), whose sum is σ = 241309497174624. Its totient is φ = 201090752736720.

The previous prime is 221200100210203. The next prime is 221200100210227. The reversal of 221200100210221 is 122012001002122.

It is a happy number.

221200100210221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221200100210221 - 2³¹ = 221197952726573 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221200100210195 and 221200100210204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221200100210227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2698495 + ... + 21205708.

It is an arithmetic number, because the mean of its divisors is an integer number (30163687146828).

Almost surely, 2^{221200100210221} is an apocalyptic number.

It is an amenable number.

221200100210221 is a deficient number, since it is larger than the sum of its proper divisors (20109396964403).

221200100210221 is a wasteful number, since it uses less digits than its factorization.

221200100210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24745451.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221200100210221 its reverse (122012001002122), we get a palindrome (343212101212343).

The spelling of 221200100210221 in words is "two hundred twenty-one trillion, two hundred billion, one hundred million, two hundred ten thousand, two hundred twenty-one".