2021200122197 has 2 divisors, whose sum is σ = 2021200122198. Its totient is φ = 2021200122196.

The previous prime is 2021200122113. The next prime is 2021200122217. The reversal of 2021200122197 is 7912210021202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1847245229956 + 173954892241 = 1359134^2 + 417079^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021200122197 - 2¹⁰ = 2021200121173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021200122797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010600061098 + 1010600061099.

It is an arithmetic number, because the mean of its divisors is an integer number (1010600061099).

Almost surely, 2^{2021200122197} is an apocalyptic number.

It is an amenable number.

2021200122197 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021200122197 is an equidigital number, since it uses as much as digits as its factorization.

2021200122197 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 2021200122197 its reverse (7912210021202), we get a palindrome (9933410143399).

The spelling of 2021200122197 in words is "two trillion, twenty-one billion, two hundred million, one hundred twenty-two thousand, one hundred ninety-seven".