1200343321 has 6 divisors (see below), whose sum is σ = 1243162622. Its totient is φ = 1158951360.

The previous prime is 1200343303. The next prime is 1200343349. The reversal of 1200343321 is 1233430021.

It can be written as a sum of positive squares in 3 ways, for example, as 414326025 + 786017296 = 20355^2 + 28036^2 .

It is not a de Polignac number, because 1200343321 - 2²¹ = 1198246169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1200343351) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 712800 + ... + 714481.

Almost surely, 2^1200343321 is an apocalyptic number.

It is an amenable number.

1200343321 is a deficient number, since it is larger than the sum of its proper divisors (42819301).

1200343321 is an equidigital number, since it uses as much as digits as its factorization.

1200343321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1427339 (or 1427310 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 1200343321 is about 34645.9712087856. The cubic root of 1200343321 is about 1062.7599020202.

Adding to 1200343321 its reverse (1233430021), we get a palindrome (2433773342).

The spelling of 1200343321 in words is "one billion, two hundred million, three hundred forty-three thousand, three hundred twenty-one".