1213323110203 has 4 divisors (see below), whose sum is σ = 1284695057880. Its totient is φ = 1141951162528.

The previous prime is 1213323110189. The next prime is 1213323110227. The reversal of 1213323110203 is 3020113233121.

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 1213323110203 - 2²⁵ = 1213289555771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213323110243) 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, 35685973813 + ... + 35685973846.

It is an arithmetic number, because the mean of its divisors is an integer number (321173764470).

Almost surely, 2^{1213323110203} is an apocalyptic number.

1213323110203 is a deficient number, since it is larger than the sum of its proper divisors (71371947677).

1213323110203 is an equidigital number, since it uses as much as digits as its factorization.

1213323110203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71371947676.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 1213323110203 its reverse (3020113233121), we get a palindrome (4233436343324).

The spelling of 1213323110203 in words is "one trillion, two hundred thirteen billion, three hundred twenty-three million, one hundred ten thousand, two hundred three".