11155122203 has 4 divisors (see below), whose sum is σ = 11811305880. Its totient is φ = 10498938528.

The previous prime is 11155122197. The next prime is 11155122227. The reversal of 11155122203 is 30222155111.

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 11155122203 - 2¹⁶ = 11155056667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11155122233) 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, 328091813 + ... + 328091846.

It is an arithmetic number, because the mean of its divisors is an integer number (2952826470).

Almost surely, 2^11155122203 is an apocalyptic number.

11155122203 is a deficient number, since it is larger than the sum of its proper divisors (656183677).

11155122203 is an equidigital number, since it uses as much as digits as its factorization.

11155122203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656183676.

The product of its (nonzero) digits is 600, while the sum is 23.

Adding to 11155122203 its reverse (30222155111), we get a palindrome (41377277314).

The spelling of 11155122203 in words is "eleven billion, one hundred fifty-five million, one hundred twenty-two thousand, two hundred three".