220220202221221 has 4 divisors (see below), whose sum is σ = 220454230067244. Its totient is φ = 219986174375200.

The previous prime is 220220202221111. The next prime is 220220202221273. The reversal of 220220202221221 is 122122202022022.

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 94371315960100 + 125848886261121 = 9714490^2 + 11218239^2 .

It is a cyclic number.

It is not a de Polignac number, because 220220202221221 - 2²¹ = 220220200124069 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220220202221192 and 220220202221201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220220202221521) 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 3 ways as a sum of consecutive naturals, for example, 117013921600 + ... + 117013923481.

It is an arithmetic number, because the mean of its divisors is an integer number (55113557516811).

Almost surely, 2^{220220202221221} is an apocalyptic number.

It is an amenable number.

220220202221221 is a deficient number, since it is larger than the sum of its proper divisors (234027846023).

220220202221221 is an equidigital number, since it uses as much as digits as its factorization.

220220202221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234027846022.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 220220202221221 its reverse (122122202022022), we get a palindrome (342342404243243).

The spelling of 220220202221221 in words is "two hundred twenty trillion, two hundred twenty billion, two hundred two million, two hundred twenty-one thousand, two hundred twenty-one".