20211020211 has 16 divisors (see below), whose sum is σ = 27221627808. Its totient is φ = 13337280000.

The previous prime is 20211020189. The next prime is 20211020279. The reversal of 20211020211 is 11202011202.

It is not a de Polignac number, because 20211020211 - 2⁶ = 20211020147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20211022211) 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 in 15 ways as a sum of consecutive naturals, for example, 2036361 + ... + 2046261.

It is an arithmetic number, because the mean of its divisors is an integer number (1701351738).

Almost surely, 2^20211020211 is an apocalyptic number.

20211020211 is a deficient number, since it is larger than the sum of its proper divisors (7010607597).

20211020211 is a wasteful number, since it uses less digits than its factorization.

20211020211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16742.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20211020211 its reverse (11202011202), we get a palindrome (31413031413).

Subtracting from 20211020211 its reverse (11202011202), we obtain a palindrome (9009009009).

The spelling of 20211020211 in words is "twenty billion, two hundred eleven million, twenty thousand, two hundred eleven".