20213111230211 has 2 divisors, whose sum is σ = 20213111230212. Its totient is φ = 20213111230210.

The previous prime is 20213111230199. The next prime is 20213111230217. The reversal of 20213111230211 is 11203211131202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20213111230211 - 2⁴² = 15815064719107 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20213111230217) 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, 10106555615105 + 10106555615106.

It is an arithmetic number, because the mean of its divisors is an integer number (10106555615106).

Almost surely, 2^{20213111230211} is an apocalyptic number.

20213111230211 is a deficient number, since it is larger than the sum of its proper divisors (1).

20213111230211 is an equidigital number, since it uses as much as digits as its factorization.

20213111230211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 20213111230211 its reverse (11203211131202), we get a palindrome (31416322361413).

Subtracting from 20213111230211 its reverse (11203211131202), we obtain a palindrome (9009900099009).

The spelling of 20213111230211 in words is "twenty trillion, two hundred thirteen billion, one hundred eleven million, two hundred thirty thousand, two hundred eleven".