20212113330121 has 2 divisors, whose sum is σ = 20212113330122. Its totient is φ = 20212113330120.

The previous prime is 20212113330109. The next prime is 20212113330197. The reversal of 20212113330121 is 12103331121202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20124016560400 + 88096769721 = 4485980^2 + 296811^2 .

It is a cyclic number.

It is not a de Polignac number, because 20212113330121 - 2¹¹ = 20212113328073 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20212113330092 and 20212113330101.

It is not a weakly prime, because it can be changed into another prime (20212113330221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106056665060 + 10106056665061.

It is an arithmetic number, because the mean of its divisors is an integer number (10106056665061).

Almost surely, 2^{20212113330121} is an apocalyptic number.

It is an amenable number.

20212113330121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20212113330121 is an equidigital number, since it uses as much as digits as its factorization.

20212113330121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 20212113330121 its reverse (12103331121202), we get a palindrome (32315444451323).

The spelling of 20212113330121 in words is "twenty trillion, two hundred twelve billion, one hundred thirteen million, three hundred thirty thousand, one hundred twenty-one".