220201021210221 has 6 divisors (see below), whose sum is σ = 318068141748110. Its totient is φ = 146800680806808.

The previous prime is 220201021210153. The next prime is 220201021210243. The reversal of 220201021210221 is 122012120102022.

It is a happy number.

220201021210221 is a `hidden beast` number, since 2 + 20 + 201 + 0 + 212 + 10 + 221 = 666.

It can be written as a sum of positive squares in only one way, i.e., 220196336492196 + 4684718025 = 14839014^2 + 68445^2 .

It is not a de Polignac number, because 220201021210221 - 2⁹ = 220201021209709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220201021210194 and 220201021210203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220201021211221) 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, 12233390067226 + ... + 12233390067243.

Almost surely, 2^{220201021210221} is an apocalyptic number.

It is an amenable number.

220201021210221 is a deficient number, since it is larger than the sum of its proper divisors (97867120537889).

220201021210221 is a wasteful number, since it uses less digits than its factorization.

220201021210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24466780134475 (or 24466780134472 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 220201021210221 its reverse (122012120102022), we get a palindrome (342213141312243).

The spelling of 220201021210221 in words is "two hundred twenty trillion, two hundred one billion, twenty-one million, two hundred ten thousand, two hundred twenty-one".