221002200101 has 4 divisors (see below), whose sum is σ = 221109850572. Its totient is φ = 220894549632.

The previous prime is 221002200049. The next prime is 221002200113. The reversal of 221002200101 is 101002200122.

It is a happy number.

221002200101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 167629649476 + 53372550625 = 409426^2 + 231025^2 .

It is a cyclic number.

It is not a de Polignac number, because 221002200101 - 2¹⁸ = 221001937957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221002200121) 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, 53822156 + ... + 53826261.

It is an arithmetic number, because the mean of its divisors is an integer number (55277462643).

Almost surely, 2^221002200101 is an apocalyptic number.

It is an amenable number.

221002200101 is a deficient number, since it is larger than the sum of its proper divisors (107650471).

221002200101 is a wasteful number, since it uses less digits than its factorization.

221002200101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107650470.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 221002200101 its reverse (101002200122), we get a palindrome (322004400223).

The spelling of 221002200101 in words is "two hundred twenty-one billion, two million, two hundred thousand, one hundred one".