10021200222221 has 4 divisors (see below), whose sum is σ = 10610682588252. Its totient is φ = 9431717856192.

The previous prime is 10021200222211. The next prime is 10021200222227. The reversal of 10021200222221 is 12222200212001.

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 7390514102500 + 2630686119721 = 2718550^2 + 1621939^2 .

It is a cyclic number.

It is not a de Polignac number, because 10021200222221 - 2¹⁴ = 10021200205837 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: 589482366013 = 10021200222221 / (1 + 0 + 0 + 2 + 1 + 2 + 0 + 0 + 2 + 2 + 2 + 2 + 2 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10021200222221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10021200222227) 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, 294741182990 + ... + 294741183023.

It is an arithmetic number, because the mean of its divisors is an integer number (2652670647063).

Almost surely, 2^{10021200222221} is an apocalyptic number.

It is an amenable number.

10021200222221 is a deficient number, since it is larger than the sum of its proper divisors (589482366031).

10021200222221 is an equidigital number, since it uses as much as digits as its factorization.

10021200222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589482366030.

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

Adding to 10021200222221 its reverse (12222200212001), we get a palindrome (22243400434222).

The spelling of 10021200222221 in words is "ten trillion, twenty-one billion, two hundred million, two hundred twenty-two thousand, two hundred twenty-one".