22221110221121 has 6 divisors (see below), whose sum is σ = 25849046583810. Its totient is φ = 19046665903776.

The previous prime is 22221110221097. The next prime is 22221110221171. The reversal of 22221110221121 is 12112201112222.

It can be written as a sum of positive squares in only one way, i.e., 16340674369600 + 5880435851521 = 4042360^2 + 2424961^2 .

It is not a de Polignac number, because 22221110221121 - 2¹⁸ = 22221109958977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22221110221093 and 22221110221102.

It is not an unprimeable number, because it can be changed into a prime (22221110221171) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 226746022616 + ... + 226746022713.

It is an arithmetic number, because the mean of its divisors is an integer number (4308174430635).

Almost surely, 2^{22221110221121} is an apocalyptic number.

It is an amenable number.

22221110221121 is a deficient number, since it is larger than the sum of its proper divisors (3627936362689).

22221110221121 is an equidigital number, since it uses as much as digits as its factorization.

22221110221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453492045343 (or 453492045336 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 22221110221121 its reverse (12112201112222), we get a palindrome (34333311333343).

The spelling of 22221110221121 in words is "twenty-two trillion, two hundred twenty-one billion, one hundred ten million, two hundred twenty-one thousand, one hundred twenty-one".