220322123221 has 4 divisors (see below), whose sum is σ = 223340234572. Its totient is φ = 217304011872.

The previous prime is 220322123209. The next prime is 220322123257. The reversal of 220322123221 is 122321223022.

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 58706867025 + 161615256196 = 242295^2 + 402014^2 .

It is a cyclic number.

It is not a de Polignac number, because 220322123221 - 2²⁵ = 220288568789 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220322123192 and 220322123201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220322123291) 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, 1509055566 + ... + 1509055711.

It is an arithmetic number, because the mean of its divisors is an integer number (55835058643).

Almost surely, 2^220322123221 is an apocalyptic number.

It is an amenable number.

220322123221 is a deficient number, since it is larger than the sum of its proper divisors (3018111351).

220322123221 is an equidigital number, since it uses as much as digits as its factorization.

220322123221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3018111350.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 220322123221 its reverse (122321223022), we get a palindrome (342643346243).

The spelling of 220322123221 in words is "two hundred twenty billion, three hundred twenty-two million, one hundred twenty-three thousand, two hundred twenty-one".