20011020211 has 64 divisors (see below), whose sum is σ = 26692485120. Its totient is φ = 14565640320.

The previous prime is 20011020199. The next prime is 20011020221. The reversal of 20011020211 is 11202011002.

It is not a de Polignac number, because 20011020211 - 2⁷ = 20011020083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20011020221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11613196 + ... + 11614918.

It is an arithmetic number, because the mean of its divisors is an integer number (417070080).

Almost surely, 2^20011020211 is an apocalyptic number.

20011020211 is a deficient number, since it is larger than the sum of its proper divisors (6681464909).

20011020211 is a wasteful number, since it uses less digits than its factorization.

20011020211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1976.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20011020211 its reverse (11202011002), we get a palindrome (31213031213).

The spelling of 20011020211 in words is "twenty billion, eleven million, twenty thousand, two hundred eleven".