1323220553203 has 4 divisors (see below), whose sum is σ = 1323260465248. Its totient is φ = 1323180641160.

The previous prime is 1323220553201. The next prime is 1323220553243. The reversal of 1323220553203 is 3023550223231.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1323220553203 - 2¹ = 1323220553201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1323220553201) 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, 19906251 + ... + 19972612.

It is an arithmetic number, because the mean of its divisors is an integer number (330815116312).

Almost surely, 2^{1323220553203} is an apocalyptic number.

1323220553203 is a deficient number, since it is larger than the sum of its proper divisors (39912045).

1323220553203 is an equidigital number, since it uses as much as digits as its factorization.

1323220553203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39912044.

The product of its (nonzero) digits is 32400, while the sum is 31.

Adding to 1323220553203 its reverse (3023550223231), we get a palindrome (4346770776434).

The spelling of 1323220553203 in words is "one trillion, three hundred twenty-three billion, two hundred twenty million, five hundred fifty-three thousand, two hundred three".