2200201221221 has 4 divisors (see below), whose sum is σ = 2200727967372. Its totient is φ = 2199674475072.

The previous prime is 2200201221191. The next prime is 2200201221271. The reversal of 2200201221221 is 1221221020022.

It is a happy number.

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 1405765922500 + 794435298721 = 1185650^2 + 891311^2 .

It is a cyclic number.

It is not a de Polignac number, because 2200201221221 - 2¹⁴ = 2200201204837 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2200201221221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2200201221271) 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, 263366810 + ... + 263375163.

It is an arithmetic number, because the mean of its divisors is an integer number (550181991843).

Almost surely, 2^{2200201221221} is an apocalyptic number.

It is an amenable number.

2200201221221 is a deficient number, since it is larger than the sum of its proper divisors (526746151).

2200201221221 is an equidigital number, since it uses as much as digits as its factorization.

2200201221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526746150.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 2200201221221 its reverse (1221221020022), we get a palindrome (3421422241243).

The spelling of 2200201221221 in words is "two trillion, two hundred billion, two hundred one million, two hundred twenty-one thousand, two hundred twenty-one".