1213423125203 has 4 divisors (see below), whose sum is σ = 1214919332088. Its totient is φ = 1211926918320.

The previous prime is 1213423125179. The next prime is 1213423125281. The reversal of 1213423125203 is 3025213243121.

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 1213423125203 - 2²⁰ = 1213422076627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213423125293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 748102226 + ... + 748103847.

It is an arithmetic number, because the mean of its divisors is an integer number (303729833022).

Almost surely, 2^{1213423125203} is an apocalyptic number.

1213423125203 is a deficient number, since it is larger than the sum of its proper divisors (1496206885).

1213423125203 is an equidigital number, since it uses as much as digits as its factorization.

1213423125203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1496206884.

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 1213423125203 its reverse (3025213243121), we get a palindrome (4238636368324).

The spelling of 1213423125203 in words is "one trillion, two hundred thirteen billion, four hundred twenty-three million, one hundred twenty-five thousand, two hundred three".