1200321322203 has 4 divisors (see below), whose sum is σ = 1600428429608. Its totient is φ = 800214214800.

The previous prime is 1200321322199. The next prime is 1200321322219. The reversal of 1200321322203 is 3022231230021.

It is a happy number.

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

It is not a de Polignac number, because 1200321322203 - 2² = 1200321322199 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 1200321322203.

It is not an unprimeable number, because it can be changed into a prime (1200321322223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200053553698 + ... + 200053553703.

It is an arithmetic number, because the mean of its divisors is an integer number (400107107402).

Almost surely, 2^{1200321322203} is an apocalyptic number.

1200321322203 is a deficient number, since it is larger than the sum of its proper divisors (400107107405).

1200321322203 is an equidigital number, since it uses as much as digits as its factorization.

1200321322203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400107107404.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 1200321322203 its reverse (3022231230021), we get a palindrome (4222552552224).

The spelling of 1200321322203 in words is "one trillion, two hundred billion, three hundred twenty-one million, three hundred twenty-two thousand, two hundred three".