1200320111321 has 16 divisors (see below), whose sum is σ = 1295716359168. Its totient is φ = 1108685265600.

The previous prime is 1200320111311. The next prime is 1200320111329. The reversal of 1200320111321 is 1231110230021.

It is a de Polignac number, because none of the positive numbers 2^k-1200320111321 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 1200320111321.

It is not an unprimeable number, because it can be changed into a prime (1200320111329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1497206 + ... + 2154591.

It is an arithmetic number, because the mean of its divisors is an integer number (80982272448).

Almost surely, 2^{1200320111321} is an apocalyptic number.

It is an amenable number.

1200320111321 is a deficient number, since it is larger than the sum of its proper divisors (95396247847).

1200320111321 is a wasteful number, since it uses less digits than its factorization.

1200320111321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3652312.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1200320111321 its reverse (1231110230021), we get a palindrome (2431430341342).

The spelling of 1200320111321 in words is "one trillion, two hundred billion, three hundred twenty million, one hundred eleven thousand, three hundred twenty-one".