20112210221 has 4 divisors (see below), whose sum is σ = 20453095200. Its totient is φ = 19771325244.

The previous prime is 20112210169. The next prime is 20112210241. The reversal of 20112210221 is 12201221102.

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 cyclic number.

It is not a de Polignac number, because 20112210221 - 2²⁶ = 20045101357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20112210196 and 20112210205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112210241) 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, 170442401 + ... + 170442518.

It is an arithmetic number, because the mean of its divisors is an integer number (5113273800).

Almost surely, 2^20112210221 is an apocalyptic number.

It is an amenable number.

20112210221 is a deficient number, since it is larger than the sum of its proper divisors (340884979).

20112210221 is an equidigital number, since it uses as much as digits as its factorization.

20112210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340884978.

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

Adding to 20112210221 its reverse (12201221102), we get a palindrome (32313431323).

The spelling of 20112210221 in words is "twenty billion, one hundred twelve million, two hundred ten thousand, two hundred twenty-one".