22110122202221 has 2 divisors, whose sum is σ = 22110122202222. Its totient is φ = 22110122202220.

The previous prime is 22110122202187. The next prime is 22110122202253. The reversal of 22110122202221 is 12220222101122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22109885473225 + 236728996 = 4702115^2 + 15386^2 .

It is a cyclic number.

It is not a de Polignac number, because 22110122202221 - 2¹⁰ = 22110122201197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22110122202193 and 22110122202202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22110122204221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11055061101110 + 11055061101111.

It is an arithmetic number, because the mean of its divisors is an integer number (11055061101111).

Almost surely, 2^{22110122202221} is an apocalyptic number.

It is an amenable number.

22110122202221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22110122202221 is an equidigital number, since it uses as much as digits as its factorization.

22110122202221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 22110122202221 its reverse (12220222101122), we get a palindrome (34330344303343).

The spelling of 22110122202221 in words is "twenty-two trillion, one hundred ten billion, one hundred twenty-two million, two hundred two thousand, two hundred twenty-one".