22201020222221 has 4 divisors (see below), whose sum is σ = 23506962588252. Its totient is φ = 20895077856192.

The previous prime is 22201020222211. The next prime is 22201020222247. The reversal of 22201020222221 is 12222202010222.

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 19683685756900 + 2517334465321 = 4436630^2 + 1586611^2 .

It is a cyclic number.

It is not a de Polignac number, because 22201020222221 - 2²⁶ = 22200953113357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22201020222193 and 22201020222202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22201020222211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 652971182990 + ... + 652971183023.

It is an arithmetic number, because the mean of its divisors is an integer number (5876740647063).

Almost surely, 2^{22201020222221} is an apocalyptic number.

It is an amenable number.

22201020222221 is a deficient number, since it is larger than the sum of its proper divisors (1305942366031).

22201020222221 is a wasteful number, since it uses less digits than its factorization.

22201020222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1305942366030.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 22201020222221 its reverse (12222202010222), we get a palindrome (34423222232443).

The spelling of 22201020222221 in words is "twenty-two trillion, two hundred one billion, twenty million, two hundred twenty-two thousand, two hundred twenty-one".