22000212102221 has 4 divisors (see below), whose sum is σ = 22007754173052. Its totient is φ = 21992670031392.

The previous prime is 22000212102151. The next prime is 22000212102289. The reversal of 22000212102221 is 12220121200022.

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 21966900376996 + 33311725225 = 4686886^2 + 182515^2 .

It is a cyclic number.

It is not a de Polignac number, because 22000212102221 - 2³⁴ = 21983032233037 is a prime.

It is a super-2 number, since 2×22000212102221² (a number of 27 digits) contains 22 as substring.

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 22000212102221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22000212102721) 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, 3771031040 + ... + 3771036873.

It is an arithmetic number, because the mean of its divisors is an integer number (5501938543263).

Almost surely, 2^{22000212102221} is an apocalyptic number.

It is an amenable number.

22000212102221 is a deficient number, since it is larger than the sum of its proper divisors (7542070831).

22000212102221 is an equidigital number, since it uses as much as digits as its factorization.

22000212102221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7542070830.

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

Adding to 22000212102221 its reverse (12220121200022), we get a palindrome (34220333302243).

The spelling of 22000212102221 in words is "twenty-two trillion, two hundred twelve million, one hundred two thousand, two hundred twenty-one".