1200200321 has 8 divisors (see below), whose sum is σ = 1208025000. Its totient is φ = 1192389120.

The previous prime is 1200200297. The next prime is 1200200327. The reversal of 1200200321 is 1230020021.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 146289025 + 1053911296 = 12095^2 + 32464^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1200200321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1200200327) 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 7 ways as a sum of consecutive naturals, for example, 223415 + ... + 228723.

It is an arithmetic number, because the mean of its divisors is an integer number (151003125).

Almost surely, 2^1200200321 is an apocalyptic number.

It is an amenable number.

1200200321 is a deficient number, since it is larger than the sum of its proper divisors (7824679).

1200200321 is a wasteful number, since it uses less digits than its factorization.

1200200321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6739.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 1200200321 is about 34643.9074153018. The cubic root of 1200200321 is about 1062.7176972335.

Adding to 1200200321 its reverse (1230020021), we get a palindrome (2430220342).

The spelling of 1200200321 in words is "one billion, two hundred million, two hundred thousand, three hundred twenty-one".