11131320203 has 4 divisors (see below), whose sum is σ = 11206027200. Its totient is φ = 11056613208.

The previous prime is 11131320121. The next prime is 11131320223. The reversal of 11131320203 is 30202313111.

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 11131320203 - 2¹⁴ = 11131303819 is a prime.

It is a super-2 number, since 2×11131320203² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11131320223) 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, 37353275 + ... + 37353572.

It is an arithmetic number, because the mean of its divisors is an integer number (2801506800).

Almost surely, 2^11131320203 is an apocalyptic number.

11131320203 is a deficient number, since it is larger than the sum of its proper divisors (74706997).

11131320203 is an equidigital number, since it uses as much as digits as its factorization.

11131320203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74706996.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 11131320203 its reverse (30202313111), we get a palindrome (41333633314).

The spelling of 11131320203 in words is "eleven billion, one hundred thirty-one million, three hundred twenty thousand, two hundred three".