20201110221 has 4 divisors (see below), whose sum is σ = 26934813632. Its totient is φ = 13467406812.

The previous prime is 20201110211. The next prime is 20201110271. The reversal of 20201110221 is 12201110202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-20201110221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20201110197 and 20201110206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201110211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3366851701 + ... + 3366851706.

It is an arithmetic number, because the mean of its divisors is an integer number (6733703408).

Almost surely, 2^20201110221 is an apocalyptic number.

It is an amenable number.

20201110221 is a deficient number, since it is larger than the sum of its proper divisors (6733703411).

20201110221 is an equidigital number, since it uses as much as digits as its factorization.

20201110221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6733703410.

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

Adding to 20201110221 its reverse (12201110202), we get a palindrome (32402220423).

The spelling of 20201110221 in words is "twenty billion, two hundred one million, one hundred ten thousand, two hundred twenty-one".