220323121 has 4 divisors (see below), whose sum is σ = 227920500. Its totient is φ = 212725744.

The previous prime is 220323119. The next prime is 220323127. The reversal of 220323121 is 121323022.

220323121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 122412096 + 97911025 = 11064^2 + 9895^2 .

It is a cyclic number.

It is not a de Polignac number, because 220323121 - 2¹ = 220323119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220323095 and 220323104.

It is not an unprimeable number, because it can be changed into a prime (220323127) 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, 3798646 + ... + 3798703.

It is an arithmetic number, because the mean of its divisors is an integer number (56980125).

Almost surely, 2^220323121 is an apocalyptic number.

It is an amenable number.

220323121 is a deficient number, since it is larger than the sum of its proper divisors (7597379).

220323121 is an equidigital number, since it uses as much as digits as its factorization.

220323121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7597378.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 220323121 is about 14843.2853843076. The cubic root of 220323121 is about 603.9764776375.

Adding to 220323121 its reverse (121323022), we get a palindrome (341646143).

Subtracting from 220323121 its reverse (121323022), we obtain a palindrome (99000099).

The spelling of 220323121 in words is "two hundred twenty million, three hundred twenty-three thousand, one hundred twenty-one".