1200031301321 has 4 divisors (see below), whose sum is σ = 1200038840772. Its totient is φ = 1200023761872.

The previous prime is 1200031301297. The next prime is 1200031301327. The reversal of 1200031301321 is 1231031300021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 212392861321 + 987638440000 = 460861^2 + 993800^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200031301321 - 2¹⁰ = 1200031300297 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1200031301321.

It is not an unprimeable number, because it can be changed into a prime (1200031301327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3525710 + ... + 3851063.

It is an arithmetic number, because the mean of its divisors is an integer number (300009710193).

Almost surely, 2^{1200031301321} is an apocalyptic number.

It is an amenable number.

1200031301321 is a deficient number, since it is larger than the sum of its proper divisors (7539451).

1200031301321 is an equidigital number, since it uses as much as digits as its factorization.

1200031301321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7539450.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 1200031301321 its reverse (1231031300021), we get a palindrome (2431062601342).

The spelling of 1200031301321 in words is "one trillion, two hundred billion, thirty-one million, three hundred one thousand, three hundred twenty-one".