221002220012201 has 4 divisors (see below), whose sum is σ = 234002350601172. Its totient is φ = 208002089423232.

The previous prime is 221002220012183. The next prime is 221002220012263. The reversal of 221002220012201 is 102210022200122.

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 136304434152601 + 84697785859600 = 11674949^2 + 9203140^2 .

It is a de Polignac number, because none of the positive numbers 2^k-221002220012201 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 13000130588953 = 221002220012201 / (2 + 2 + 1 + 0 + 0 + 2 + 2 + 2 + 0 + 0 + 1 + 2 + 2 + 0 + 1).

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 221002220012201.

It is not an unprimeable number, because it can be changed into a prime (221002220015201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6500065294460 + ... + 6500065294493.

It is an arithmetic number, because the mean of its divisors is an integer number (58500587650293).

Almost surely, 2^{221002220012201} is an apocalyptic number.

It is an amenable number.

221002220012201 is a deficient number, since it is larger than the sum of its proper divisors (13000130588971).

221002220012201 is a wasteful number, since it uses less digits than its factorization.

221002220012201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13000130588970.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 221002220012201 its reverse (102210022200122), we get a palindrome (323212242212323).

The spelling of 221002220012201 in words is "two hundred twenty-one trillion, two billion, two hundred twenty million, twelve thousand, two hundred one".