2201122120221 has 24 divisors (see below), whose sum is σ = 3269552920920. Its totient is φ = 1425907691136.

The previous prime is 2201122120193. The next prime is 2201122120303. The reversal of 2201122120221 is 1220212211022.

It is a happy number.

2201122120221 is a `hidden beast` number, since 2 + 201 + 1 + 221 + 20 + 221 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 20520900 + 2201101599321 = 4530^2 + 1483611^2 .

It is not a de Polignac number, because 2201122120221 - 2¹³ = 2201122112029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2201122120194 and 2201122120203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2201122120721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4018126 + ... + 4532943.

It is an arithmetic number, because the mean of its divisors is an integer number (136231371705).

Almost surely, 2^{2201122120221} is an apocalyptic number.

It is an amenable number.

2201122120221 is a deficient number, since it is larger than the sum of its proper divisors (1068430800699).

2201122120221 is a wasteful number, since it uses less digits than its factorization.

2201122120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8551885 (or 8551882 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2201122120221 its reverse (1220212211022), we get a palindrome (3421334331243).

The spelling of 2201122120221 in words is "two trillion, two hundred one billion, one hundred twenty-two million, one hundred twenty thousand, two hundred twenty-one".