20211011011211 has 2 divisors, whose sum is σ = 20211011011212. Its totient is φ = 20211011011210.

The previous prime is 20211011011159. The next prime is 20211011011267. The reversal of 20211011011211 is 11211011011202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20211011011211 - 2¹⁰ = 20211011010187 is a prime.

It is not a weakly prime, because it can be changed into another prime (20211011011111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105505505605 + 10105505505606.

It is an arithmetic number, because the mean of its divisors is an integer number (10105505505606).

Almost surely, 2^{20211011011211} is an apocalyptic number.

20211011011211 is a deficient number, since it is larger than the sum of its proper divisors (1).

20211011011211 is an equidigital number, since it uses as much as digits as its factorization.

20211011011211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 20211011011211 its reverse (11211011011202), we get a palindrome (31422022022413).

Subtracting from 20211011011211 its reverse (11211011011202), we obtain a palindrome (9000000000009).

The spelling of 20211011011211 in words is "twenty trillion, two hundred eleven billion, eleven million, eleven thousand, two hundred eleven".