20022110221 has 4 divisors (see below), whose sum is σ = 20022708700. Its totient is φ = 20021511744.

The previous prime is 20022110201. The next prime is 20022110237. The reversal of 20022110221 is 12201122002.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19428456996 + 593653225 = 139386^2 + 24365^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20022110221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20022110201) 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, 245886 + ... + 317023.

It is an arithmetic number, because the mean of its divisors is an integer number (5005677175).

Almost surely, 2^20022110221 is an apocalyptic number.

It is an amenable number.

20022110221 is a deficient number, since it is larger than the sum of its proper divisors (598479).

20022110221 is an equidigital number, since it uses as much as digits as its factorization.

20022110221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598478.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20022110221 its reverse (12201122002), we get a palindrome (32223232223).

The spelling of 20022110221 in words is "twenty billion, twenty-two million, one hundred ten thousand, two hundred twenty-one".