211020002212121 has 2 divisors, whose sum is σ = 211020002212122. Its totient is φ = 211020002212120.

The previous prime is 211020002212091. The next prime is 211020002212169. The reversal of 211020002212121 is 121212200020112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142890083024896 + 68129919187225 = 11953664^2 + 8254085^2 .

It is a cyclic number.

It is not a de Polignac number, because 211020002212121 - 2¹⁰ = 211020002211097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211020002212121.

It is not a weakly prime, because it can be changed into another prime (211020002212321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105510001106060 + 105510001106061.

It is an arithmetic number, because the mean of its divisors is an integer number (105510001106061).

Almost surely, 2^{211020002212121} is an apocalyptic number.

It is an amenable number.

211020002212121 is a deficient number, since it is larger than the sum of its proper divisors (1).

211020002212121 is an equidigital number, since it uses as much as digits as its factorization.

211020002212121 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 211020002212121 its reverse (121212200020112), we get a palindrome (332232202232233).

The spelling of 211020002212121 in words is "two hundred eleven trillion, twenty billion, two million, two hundred twelve thousand, one hundred twenty-one".