211002112021 has 2 divisors, whose sum is σ = 211002112022. Its totient is φ = 211002112020.

The previous prime is 211002112007. The next prime is 211002112039. The reversal of 211002112021 is 120211200112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 177566160996 + 33435951025 = 421386^2 + 182855^2 .

It is a cyclic number.

It is not a de Polignac number, because 211002112021 - 2³⁵ = 176642373653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211002111992 and 211002112010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211002112051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105501056010 + 105501056011.

It is an arithmetic number, because the mean of its divisors is an integer number (105501056011).

Almost surely, 2^211002112021 is an apocalyptic number.

It is an amenable number.

211002112021 is a deficient number, since it is larger than the sum of its proper divisors (1).

211002112021 is an equidigital number, since it uses as much as digits as its factorization.

211002112021 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 211002112021 its reverse (120211200112), we get a palindrome (331213312133).

The spelling of 211002112021 in words is "two hundred eleven billion, two million, one hundred twelve thousand, twenty-one".