20220000000221 has 6 divisors (see below), whose sum is σ = 23521224490110. Its totient is φ = 17331428571576.

The previous prime is 20220000000217. The next prime is 20220000000287. The reversal of 20220000000221 is 12200000002202.

It can be written as a sum of positive squares in only one way, i.e., 20219006868025 + 993132196 = 4496555^2 + 31514^2 .

It is not a de Polignac number, because 20220000000221 - 2² = 20220000000217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20220000006221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 206326530566 + ... + 206326530663.

It is an arithmetic number, because the mean of its divisors is an integer number (3920204081685).

Almost surely, 2^{20220000000221} is an apocalyptic number.

It is an amenable number.

20220000000221 is a deficient number, since it is larger than the sum of its proper divisors (3301224489889).

20220000000221 is an equidigital number, since it uses as much as digits as its factorization.

20220000000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412653061243 (or 412653061236 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

Adding to 20220000000221 its reverse (12200000002202), we get a palindrome (32420000002423).

The spelling of 20220000000221 in words is "twenty trillion, two hundred twenty billion, two hundred twenty-one", and thus it is an aban number.