123220443321 has 10 divisors (see below), whose sum is σ = 184070045082. Its totient is φ = 82146962160.

The previous prime is 123220443319. The next prime is 123220443323. The reversal of 123220443321 is 123344022321.

123220443321 is a `hidden beast` number, since 1 + 2 + 3 + 2 + 204 + 433 + 21 = 666.

It is an interprime number because it is at equal distance from previous prime (123220443319) and next prime (123220443323).

It can be written as a sum of positive squares in only one way, i.e., 105005162025 + 18215281296 = 324045^2 + 134964^2 .

It is not a de Polignac number, because 123220443321 - 2¹ = 123220443319 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (123220443323) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 760619940 + ... + 760620101.

Almost surely, 2^123220443321 is an apocalyptic number.

It is an amenable number.

123220443321 is a deficient number, since it is larger than the sum of its proper divisors (60849601761).

123220443321 is an equidigital number, since it uses as much as digits as its factorization.

123220443321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1521240053 (or 1521240044 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 123220443321 its reverse (123344022321), we get a palindrome (246564465642).

The spelling of 123220443321 in words is "one hundred twenty-three billion, two hundred twenty million, four hundred forty-three thousand, three hundred twenty-one".