2221002221221 has 16 divisors (see below), whose sum is σ = 2597623357824. Its totient is φ = 1859225264064.

The previous prime is 2221002221201. The next prime is 2221002221261. The reversal of 2221002221221 is 1221222001222.

It is not a de Polignac number, because 2221002221221 - 2⁵ = 2221002221189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221002221201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2158551 + ... + 3016843.

It is an arithmetic number, because the mean of its divisors is an integer number (162351459864).

Almost surely, 2^{2221002221221} is an apocalyptic number.

It is an amenable number.

2221002221221 is a deficient number, since it is larger than the sum of its proper divisors (376621136603).

2221002221221 is an equidigital number, since it uses as much as digits as its factorization.

2221002221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866940.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 2221002221221 its reverse (1221222001222), we get a palindrome (3442224222443).

The spelling of 2221002221221 in words is "two trillion, two hundred twenty-one billion, two million, two hundred twenty-one thousand, two hundred twenty-one".