22120211210221 has 4 divisors (see below), whose sum is σ = 22125134475612. Its totient is φ = 22115287944832.

The previous prime is 22120211210191. The next prime is 22120211210267. The reversal of 22120211210221 is 12201211202122.

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 21177391572100 + 942819638121 = 4601890^2 + 970989^2 .

It is a cyclic number.

It is not a de Polignac number, because 22120211210221 - 2²⁵ = 22120177655789 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 (22120211214221) 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, 2461625956 + ... + 2461634941.

It is an arithmetic number, because the mean of its divisors is an integer number (5531283618903).

Almost surely, 2^{22120211210221} is an apocalyptic number.

It is an amenable number.

22120211210221 is a deficient number, since it is larger than the sum of its proper divisors (4923265391).

22120211210221 is an equidigital number, since it uses as much as digits as its factorization.

22120211210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4923265390.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 22120211210221 its reverse (12201211202122), we get a palindrome (34321422412343).

The spelling of 22120211210221 in words is "twenty-two trillion, one hundred twenty billion, two hundred eleven million, two hundred ten thousand, two hundred twenty-one".