221022102100201 has 4 divisors (see below), whose sum is σ = 221022159700804. Its totient is φ = 221022044499600.

The previous prime is 221022102100187. The next prime is 221022102100213. The reversal of 221022102100201 is 102001201220122.

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 41844066752601 + 179178035347600 = 6468699^2 + 13385740^2 .

It is a cyclic number.

It is not a de Polignac number, because 221022102100201 - 2⁴⁷ = 80284613744873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221022102100301) 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, 22599570 + ... + 30867211.

It is an arithmetic number, because the mean of its divisors is an integer number (55255539925201).

Almost surely, 2^{221022102100201} is an apocalyptic number.

It is an amenable number.

221022102100201 is a deficient number, since it is larger than the sum of its proper divisors (57600603).

221022102100201 is an equidigital number, since it uses as much as digits as its factorization.

221022102100201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57600602.

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

Adding to 221022102100201 its reverse (102001201220122), we get a palindrome (323023303320323).

The spelling of 221022102100201 in words is "two hundred twenty-one trillion, twenty-two billion, one hundred two million, one hundred thousand, two hundred one".