220020010220221 has 4 divisors (see below), whose sum is σ = 220078949417692. Its totient is φ = 219961071022752.

The previous prime is 220020010220177. The next prime is 220020010220287. The reversal of 220020010220221 is 122022010020022.

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 148742684312121 + 71277325908100 = 12196011^2 + 8442590^2 .

It is a cyclic number.

It is not a de Polignac number, because 220020010220221 - 2⁴⁷ = 79282521864893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220020010220195 and 220020010220204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220020010290221) 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, 29469593136 + ... + 29469600601.

It is an arithmetic number, because the mean of its divisors is an integer number (55019737354423).

Almost surely, 2^{220020010220221} is an apocalyptic number.

It is an amenable number.

220020010220221 is a deficient number, since it is larger than the sum of its proper divisors (58939197471).

220020010220221 is an equidigital number, since it uses as much as digits as its factorization.

220020010220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58939197470.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 220020010220221 its reverse (122022010020022), we get a palindrome (342042020240243).

The spelling of 220020010220221 in words is "two hundred twenty trillion, twenty billion, ten million, two hundred twenty thousand, two hundred twenty-one".