221022102020101 has 4 divisors (see below), whose sum is σ = 221022971027692. Its totient is φ = 221021233012512.

The previous prime is 221022102020089. The next prime is 221022102020107. The reversal of 221022102020101 is 101020201220122.

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 52603325424225 + 168418776595876 = 7252815^2 + 12977626^2 .

It is a cyclic number.

It is not a de Polignac number, because 221022102020101 - 2²⁵ = 221022068465669 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 (221022102020107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 434122176 + ... + 434631001.

It is an arithmetic number, because the mean of its divisors is an integer number (55255742756923).

Almost surely, 2^{221022102020101} is an apocalyptic number.

It is an amenable number.

221022102020101 is a deficient number, since it is larger than the sum of its proper divisors (869007591).

221022102020101 is an equidigital number, since it uses as much as digits as its factorization.

221022102020101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869007590.

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

Adding to 221022102020101 its reverse (101020201220122), we get a palindrome (322042303240223).

The spelling of 221022102020101 in words is "two hundred twenty-one trillion, twenty-two billion, one hundred two million, twenty thousand, one hundred one".