220122202212221 has 4 divisors (see below), whose sum is σ = 233070567048252. Its totient is φ = 207173837376192.

The previous prime is 220122202212193. The next prime is 220122202212223. The reversal of 220122202212221 is 122212202221022.

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 68970201328900 + 151152000883321 = 8304830^2 + 12294389^2 .

It is a cyclic number.

It is not a de Polignac number, because 220122202212221 - 2³⁸ = 219847324305277 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 (220122202212223) 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, 6474182417990 + ... + 6474182418023.

It is an arithmetic number, because the mean of its divisors is an integer number (58267641762063).

Almost surely, 2^{220122202212221} is an apocalyptic number.

It is an amenable number.

220122202212221 is a deficient number, since it is larger than the sum of its proper divisors (12948364836031).

220122202212221 is a wasteful number, since it uses less digits than its factorization.

220122202212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12948364836030.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 220122202212221 its reverse (122212202221022), we get a palindrome (342334404433243).

The spelling of 220122202212221 in words is "two hundred twenty trillion, one hundred twenty-two billion, two hundred two million, two hundred twelve thousand, two hundred twenty-one".