2222221201121 has 4 divisors (see below), whose sum is σ = 2242608551700. Its totient is φ = 2201833850544.

The previous prime is 2222221201073. The next prime is 2222221201157. The reversal of 2222221201121 is 1211021222222.

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 1311792262225 + 910428938896 = 1145335^2 + 954164^2 .

It is a cyclic number.

It is not a de Polignac number, because 2222221201121 - 2¹⁰ = 2222221200097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2222221201093 and 2222221201102.

It is not an unprimeable number, because it can be changed into a prime (2222221201181) 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, 10193675126 + ... + 10193675343.

It is an arithmetic number, because the mean of its divisors is an integer number (560652137925).

Almost surely, 2^{2222221201121} is an apocalyptic number.

It is an amenable number.

2222221201121 is a deficient number, since it is larger than the sum of its proper divisors (20387350579).

2222221201121 is a wasteful number, since it uses less digits than its factorization.

2222221201121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20387350578.

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

Adding to 2222221201121 its reverse (1211021222222), we get a palindrome (3433242423343).

The spelling of 2222221201121 in words is "two trillion, two hundred twenty-two billion, two hundred twenty-one million, two hundred one thousand, one hundred twenty-one".