1200013321 has 4 divisors (see below), whose sum is σ = 1292322052. Its totient is φ = 1107704592.

The previous prime is 1200013273. The next prime is 1200013361. The reversal of 1200013321 is 1233100021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1233100021 = 359 ⋅3434819.

It can be written as a sum of positive squares in 2 ways, for example, as 279558400 + 920454921 = 16720^2 + 30339^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200013321 - 2¹¹ = 1200011273 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 92308717 = 1200013321 / (1 + 2 + 0 + 0 + 0 + 1 + 3 + 3 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1200013361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46154346 + ... + 46154371.

It is an arithmetic number, because the mean of its divisors is an integer number (323080513).

Almost surely, 2^1200013321 is an apocalyptic number.

It is an amenable number.

1200013321 is a deficient number, since it is larger than the sum of its proper divisors (92308731).

1200013321 is an equidigital number, since it uses as much as digits as its factorization.

1200013321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92308730.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1200013321 is about 34641.2084229174. The cubic root of 1200013321 is about 1062.6625013000.

Adding to 1200013321 its reverse (1233100021), we get a palindrome (2433113342).

The spelling of 1200013321 in words is "one billion, two hundred million, thirteen thousand, three hundred twenty-one".