220020012221 has 4 divisors (see below), whose sum is σ = 220814308572. Its totient is φ = 219225715872.

The previous prime is 220020012211. The next prime is 220020012227. The reversal of 220020012221 is 122210020022.

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 50798848996 + 169221163225 = 225386^2 + 411365^2 .

It is a cyclic number.

It is not a de Polignac number, because 220020012221 - 2¹⁸ = 220019750077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220020012196 and 220020012205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220020012227) 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, 397147760 + ... + 397148313.

It is an arithmetic number, because the mean of its divisors is an integer number (55203577143).

Almost surely, 2^220020012221 is an apocalyptic number.

It is an amenable number.

220020012221 is a deficient number, since it is larger than the sum of its proper divisors (794296351).

220020012221 is an equidigital number, since it uses as much as digits as its factorization.

220020012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794296350.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 220020012221 its reverse (122210020022), we get a palindrome (342230032243).

The spelling of 220020012221 in words is "two hundred twenty billion, twenty million, twelve thousand, two hundred twenty-one".