211020202020011 has 4 divisors (see below), whose sum is σ = 213068941845552. Its totient is φ = 208971462194472.

The previous prime is 211020202019999. The next prime is 211020202020013. The reversal of 211020202020011 is 110020202020112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211020202020011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211020202020013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1024369912616 + ... + 1024369912821.

It is an arithmetic number, because the mean of its divisors is an integer number (53267235461388).

Almost surely, 2^{211020202020011} is an apocalyptic number.

211020202020011 is a deficient number, since it is larger than the sum of its proper divisors (2048739825541).

211020202020011 is a wasteful number, since it uses less digits than its factorization.

211020202020011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2048739825540.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 211020202020011 its reverse (110020202020112), we get a palindrome (321040404040123).

The spelling of 211020202020011 in words is "two hundred eleven trillion, twenty billion, two hundred two million, twenty thousand, eleven".