20201323211 has 4 divisors (see below), whose sum is σ = 20239949592. Its totient is φ = 20162696832.

The previous prime is 20201323171. The next prime is 20201323217. The reversal of 20201323211 is 11232310202.

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 20201323211 - 2¹⁰ = 20201322187 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20201323211.

It is not an unprimeable number, because it can be changed into a prime (20201323217) 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 3 ways as a sum of consecutive naturals, for example, 19312406 + ... + 19313451.

It is an arithmetic number, because the mean of its divisors is an integer number (5059987398).

Almost surely, 2^20201323211 is an apocalyptic number.

20201323211 is a deficient number, since it is larger than the sum of its proper divisors (38626381).

20201323211 is an equidigital number, since it uses as much as digits as its factorization.

20201323211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38626380.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20201323211 its reverse (11232310202), we get a palindrome (31433633413).

It can be divided in two parts, 2020 and 1323211, that added together give a palindrome (1325231).

The spelling of 20201323211 in words is "twenty billion, two hundred one million, three hundred twenty-three thousand, two hundred eleven".