20212113330197 has 2 divisors, whose sum is σ = 20212113330198. Its totient is φ = 20212113330196.

The previous prime is 20212113330121. The next prime is 20212113330221. The reversal of 20212113330197 is 79103331121202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12043183368241 + 8168929961956 = 3470329^2 + 2858134^2 .

It is a cyclic number.

It is not a de Polignac number, because 20212113330197 - 2¹² = 20212113326101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20212113330397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106056665098 + 10106056665099.

It is an arithmetic number, because the mean of its divisors is an integer number (10106056665099).

Almost surely, 2^{20212113330197} is an apocalyptic number.

It is an amenable number.

20212113330197 is a deficient number, since it is larger than the sum of its proper divisors (1).

20212113330197 is an equidigital number, since it uses as much as digits as its factorization.

20212113330197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 35.

Adding to 20212113330197 its reverse (79103331121202), we get a palindrome (99315444451399).

The spelling of 20212113330197 in words is "twenty trillion, two hundred twelve billion, one hundred thirteen million, three hundred thirty thousand, one hundred ninety-seven".