20201020211 has 4 divisors (see below), whose sum is σ = 20219918400. Its totient is φ = 20182122024.

The previous prime is 20201020193. The next prime is 20201020237. The reversal of 20201020211 is 11202010202.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20201020211 - 2¹⁴ = 20201003827 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20201020192 and 20201020201.

It is not an unprimeable number, because it can be changed into a prime (20201020271) 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, 9447491 + ... + 9449628.

It is an arithmetic number, because the mean of its divisors is an integer number (5054979600).

Almost surely, 2^20201020211 is an apocalyptic number.

20201020211 is a deficient number, since it is larger than the sum of its proper divisors (18898189).

20201020211 is a wasteful number, since it uses less digits than its factorization.

20201020211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18898188.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20201020211 its reverse (11202010202), we get a palindrome (31403030413).

It can be divided in two parts, 202010202 and 11, that multiplied together give a palindrome (2222112222).

The spelling of 20201020211 in words is "twenty billion, two hundred one million, twenty thousand, two hundred eleven".