20022120012121 has 2 divisors, whose sum is σ = 20022120012122. Its totient is φ = 20022120012120.

The previous prime is 20022120012047. The next prime is 20022120012187. The reversal of 20022120012121 is 12121002122002.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17257668435225 + 2764451576896 = 4154235^2 + 1662664^2 .

It is a cyclic number.

It is not a de Polignac number, because 20022120012121 - 2¹⁹ = 20022119487833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20022120012095 and 20022120012104.

It is not a weakly prime, because it can be changed into another prime (20022120012721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10011060006060 + 10011060006061.

It is an arithmetic number, because the mean of its divisors is an integer number (10011060006061).

Almost surely, 2^{20022120012121} is an apocalyptic number.

It is an amenable number.

20022120012121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20022120012121 is an equidigital number, since it uses as much as digits as its factorization.

20022120012121 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 20022120012121 its reverse (12121002122002), we get a palindrome (32143122134123).

The spelling of 20022120012121 in words is "twenty trillion, twenty-two billion, one hundred twenty million, twelve thousand, one hundred twenty-one".