2202220221221 has 4 divisors (see below), whose sum is σ = 2202264411744. Its totient is φ = 2202176030700.

The previous prime is 2202220221197. The next prime is 2202220221239. The reversal of 2202220221221 is 1221220222022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2202220221221 - 2³⁸ = 1927342314277 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2202220221193 and 2202220221202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2202220226221) 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, 22020425 + ... + 22120206.

It is an arithmetic number, because the mean of its divisors is an integer number (550566102936).

Almost surely, 2^{2202220221221} is an apocalyptic number.

It is an amenable number.

2202220221221 is a deficient number, since it is larger than the sum of its proper divisors (44190523).

2202220221221 is an equidigital number, since it uses as much as digits as its factorization.

2202220221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44190522.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 2202220221221 its reverse (1221220222022), we get a palindrome (3423440443243).

The spelling of 2202220221221 in words is "two trillion, two hundred two billion, two hundred twenty million, two hundred twenty-one thousand, two hundred twenty-one".