200201212100861 has 2 divisors, whose sum is σ = 200201212100862. Its totient is φ = 200201212100860.

The previous prime is 200201212100843. The next prime is 200201212100863. The reversal of 200201212100861 is 168001212102002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 200009429415961 + 191782684900 = 14142469^2 + 437930^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200201212100861 is a prime.

Together with 200201212100863, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 200201212100861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200201212100863) 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, 100100606050430 + 100100606050431.

It is an arithmetic number, because the mean of its divisors is an integer number (100100606050431).

Almost surely, 2^{200201212100861} is an apocalyptic number.

It is an amenable number.

200201212100861 is a deficient number, since it is larger than the sum of its proper divisors (1).

200201212100861 is an equidigital number, since it uses as much as digits as its factorization.

200201212100861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 26.

Adding to 200201212100861 its reverse (168001212102002), we get a palindrome (368202424202863).

The spelling of 200201212100861 in words is "two hundred trillion, two hundred one billion, two hundred twelve million, one hundred thousand, eight hundred sixty-one".