20012002122197 has 2 divisors, whose sum is σ = 20012002122198. Its totient is φ = 20012002122196.

The previous prime is 20012002122137. The next prime is 20012002122223. The reversal of 20012002122197 is 79122120021002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15346030594801 + 4665971527396 = 3917401^2 + 2160086^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20012002122197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20012002122137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006001061098 + 10006001061099.

It is an arithmetic number, because the mean of its divisors is an integer number (10006001061099).

Almost surely, 2^{20012002122197} is an apocalyptic number.

It is an amenable number.

20012002122197 is a deficient number, since it is larger than the sum of its proper divisors (1).

20012002122197 is an equidigital number, since it uses as much as digits as its factorization.

20012002122197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 29.

Adding to 20012002122197 its reverse (79122120021002), we get a palindrome (99134122143199).

The spelling of 20012002122197 in words is "twenty trillion, twelve billion, two million, one hundred twenty-two thousand, one hundred ninety-seven".