2221102020121 has 2 divisors, whose sum is σ = 2221102020122. Its totient is φ = 2221102020120.

The previous prime is 2221102020113. The next prime is 2221102020133. The reversal of 2221102020121 is 1210202011222.

It is a happy number.

2221102020121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2218726432521 + 2375587600 = 1489539^2 + 48740^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221102020121 - 2³ = 2221102020113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2221102020095 and 2221102020104.

It is not a weakly prime, because it can be changed into another prime (2221102020521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110551010060 + 1110551010061.

It is an arithmetic number, because the mean of its divisors is an integer number (1110551010061).

Almost surely, 2^{2221102020121} is an apocalyptic number.

It is an amenable number.

2221102020121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221102020121 is an equidigital number, since it uses as much as digits as its factorization.

2221102020121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2221102020121 its reverse (1210202011222), we get a palindrome (3431304031343).

The spelling of 2221102020121 in words is "two trillion, two hundred twenty-one billion, one hundred two million, twenty thousand, one hundred twenty-one".