11123131223203 has 4 divisors (see below), whose sum is σ = 11777433059880. Its totient is φ = 10468829386528.

The previous prime is 11123131223167. The next prime is 11123131223249. The reversal of 11123131223203 is 30232213132111.

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 11123131223203 - 2¹³ = 11123131215011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11123131223293) 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, 327150918313 + ... + 327150918346.

It is an arithmetic number, because the mean of its divisors is an integer number (2944358264970).

Almost surely, 2^{11123131223203} is an apocalyptic number.

11123131223203 is a deficient number, since it is larger than the sum of its proper divisors (654301836677).

11123131223203 is an equidigital number, since it uses as much as digits as its factorization.

11123131223203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654301836676.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 11123131223203 its reverse (30232213132111), we get a palindrome (41355344355314).

The spelling of 11123131223203 in words is "eleven trillion, one hundred twenty-three billion, one hundred thirty-one million, two hundred twenty-three thousand, two hundred three".