123220200321 has 10 divisors (see below), whose sum is σ = 184069682082. Its totient is φ = 82146800160.

The previous prime is 123220200293. The next prime is 123220200347. The reversal of 123220200321 is 123002022321.

123220200321 is a `hidden beast` number, since 1 + 2 + 322 + 0 + 20 + 0 + 321 = 666.

It can be written as a sum of positive squares in only one way, i.e., 76839840000 + 46380360321 = 277200^2 + 215361^2 .

It is not a de Polignac number, because 123220200321 - 2¹³ = 123220192129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123220200294 and 123220200303.

It is not an unprimeable number, because it can be changed into a prime (123220200371) 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, 760618440 + ... + 760618601.

Almost surely, 2^123220200321 is an apocalyptic number.

It is an amenable number.

123220200321 is a deficient number, since it is larger than the sum of its proper divisors (60849481761).

123220200321 is an equidigital number, since it uses as much as digits as its factorization.

123220200321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1521237053 (or 1521237044 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 123220200321 its reverse (123002022321), we get a palindrome (246222222642).

The spelling of 123220200321 in words is "one hundred twenty-three billion, two hundred twenty million, two hundred thousand, three hundred twenty-one".