211202012200121 has 2 divisors, whose sum is σ = 211202012200122. Its totient is φ = 211202012200120.

The previous prime is 211202012200111. The next prime is 211202012200169. The reversal of 211202012200121 is 121002210202112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119450997444496 + 91751014755625 = 10929364^2 + 9578675^2 .

It is a cyclic number.

It is not a de Polignac number, because 211202012200121 - 2¹⁰ = 211202012199097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211202012200121.

It is not a weakly prime, because it can be changed into another prime (211202012200111) 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, 105601006100060 + 105601006100061.

It is an arithmetic number, because the mean of its divisors is an integer number (105601006100061).

Almost surely, 2^{211202012200121} is an apocalyptic number.

It is an amenable number.

211202012200121 is a deficient number, since it is larger than the sum of its proper divisors (1).

211202012200121 is an equidigital number, since it uses as much as digits as its factorization.

211202012200121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 211202012200121 its reverse (121002210202112), we get a palindrome (332204222402233).

The spelling of 211202012200121 in words is "two hundred eleven trillion, two hundred two billion, twelve million, two hundred thousand, one hundred twenty-one".