220020321323221 has 4 divisors (see below), whose sum is σ = 220190747599744. Its totient is φ = 219849895046700.

The previous prime is 220020321323219. The next prime is 220020321323237. The reversal of 220020321323221 is 122323123020022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 220020321323221 - 2¹ = 220020321323219 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 (220020321323251) 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, 85213136325 + ... + 85213138906.

It is an arithmetic number, because the mean of its divisors is an integer number (55047686899936).

Almost surely, 2^{220020321323221} is an apocalyptic number.

It is an amenable number.

220020321323221 is a deficient number, since it is larger than the sum of its proper divisors (170426276523).

220020321323221 is a wasteful number, since it uses less digits than its factorization.

220020321323221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170426276522.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 220020321323221 its reverse (122323123020022), we get a palindrome (342343444343243).

The spelling of 220020321323221 in words is "two hundred twenty trillion, twenty billion, three hundred twenty-one million, three hundred twenty-three thousand, two hundred twenty-one".