20022021202221 has 20 divisors (see below), whose sum is σ = 29913607349692. Its totient is φ = 13346153915328.

The previous prime is 20022021202163. The next prime is 20022021202231. The reversal of 20022021202221 is 12220212022002.

20022021202221 is a `hidden beast` number, since 2 + 0 + 0 + 220 + 21 + 202 + 221 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19420644216996 + 601376985225 = 4406886^2 + 775485^2 .

It is not a de Polignac number, because 20022021202221 - 2⁷ = 20022021202093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20022021202194 and 20022021202203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20022021202231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 16639330 + ... + 17802003.

Almost surely, 2^{20022021202221} is an apocalyptic number.

It is an amenable number.

20022021202221 is a deficient number, since it is larger than the sum of its proper divisors (9891586147471).

20022021202221 is an equidigital number, since it uses as much as digits as its factorization.

20022021202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34448522 (or 34448513 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 20022021202221 its reverse (12220212022002), we get a palindrome (32242233224223).

The spelling of 20022021202221 in words is "twenty trillion, twenty-two billion, twenty-one million, two hundred two thousand, two hundred twenty-one".