20011011211 has 2 divisors, whose sum is σ = 20011011212. Its totient is φ = 20011011210.

The previous prime is 20011011187. The next prime is 20011011227. The reversal of 20011011211 is 11211011002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20011011211 - 2¹¹ = 20011009163 is a prime.

It is not a weakly prime, because it can be changed into another prime (20011011271) 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, 10005505605 + 10005505606.

It is an arithmetic number, because the mean of its divisors is an integer number (10005505606).

Almost surely, 2^20011011211 is an apocalyptic number.

20011011211 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011011211 is an equidigital number, since it uses as much as digits as its factorization.

20011011211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 20011011211 its reverse (11211011002), we get a palindrome (31222022213).

The spelling of 20011011211 in words is "twenty billion, eleven million, eleven thousand, two hundred eleven".