211201012021 has 2 divisors, whose sum is σ = 211201012022. Its totient is φ = 211201012020.

The previous prime is 211201012019. The next prime is 211201012067. The reversal of 211201012021 is 120210102112.

211201012021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209960986225 + 1240025796 = 458215^2 + 35214^2 .

It is a cyclic number.

It is not a de Polignac number, because 211201012021 - 2¹ = 211201012019 is a prime.

Together with 211201012019, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 211201011992 and 211201012010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211201013021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105600506010 + 105600506011.

It is an arithmetic number, because the mean of its divisors is an integer number (105600506011).

Almost surely, 2^211201012021 is an apocalyptic number.

It is an amenable number.

211201012021 is a deficient number, since it is larger than the sum of its proper divisors (1).

211201012021 is an equidigital number, since it uses as much as digits as its factorization.

211201012021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 211201012021 its reverse (120210102112), we get a palindrome (331411114133).

Subtracting from 211201012021 its reverse (120210102112), we obtain a palindrome (90990909909).

The spelling of 211201012021 in words is "two hundred eleven billion, two hundred one million, twelve thousand, twenty-one".