22202121200221 has 4 divisors (see below), whose sum is σ = 22203776729344. Its totient is φ = 22200465671100.

The previous prime is 22202121200219. The next prime is 22202121200227. The reversal of 22202121200221 is 12200212120222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22202121200221 - 2¹ = 22202121200219 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 (22202121200227) 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, 827744445 + ... + 827771266.

It is an arithmetic number, because the mean of its divisors is an integer number (5550944182336).

Almost surely, 2^{22202121200221} is an apocalyptic number.

It is an amenable number.

22202121200221 is a deficient number, since it is larger than the sum of its proper divisors (1655529123).

22202121200221 is a wasteful number, since it uses less digits than its factorization.

22202121200221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1655529122.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 22202121200221 its reverse (12200212120222), we get a palindrome (34402333320443).

The spelling of 22202121200221 in words is "twenty-two trillion, two hundred two billion, one hundred twenty-one million, two hundred thousand, two hundred twenty-one".