1230200321 has 6 divisors (see below), whose sum is σ = 1431049410. Its totient is φ = 1054457376.

The previous prime is 1230200317. The next prime is 1230200339. The reversal of 1230200321 is 1230020321.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 743380225 + 486820096 = 27265^2 + 22064^2 .

It is not a de Polignac number, because 1230200321 - 2² = 1230200317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1230200296 and 1230200305.

It is not an unprimeable number, because it can be changed into a prime (1230200371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12553016 + ... + 12553113.

It is an arithmetic number, because the mean of its divisors is an integer number (238508235).

Almost surely, 2^1230200321 is an apocalyptic number.

It is an amenable number.

1230200321 is a deficient number, since it is larger than the sum of its proper divisors (200849089).

1230200321 is an equidigital number, since it uses as much as digits as its factorization.

1230200321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25106143 (or 25106136 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1230200321 is about 35074.2116233566. The cubic root of 1230200321 is about 1071.4994324376.

Adding to 1230200321 its reverse (1230020321), we get a palindrome (2460220642).

The spelling of 1230200321 in words is "one billion, two hundred thirty million, two hundred thousand, three hundred twenty-one".