11311031130203 has 4 divisors (see below), whose sum is σ = 12926892720240. Its totient is φ = 9695169540168.

The previous prime is 11311031130199. The next prime is 11311031130221. The reversal of 11311031130203 is 30203113011311.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 11311031130203 - 2² = 11311031130199 is a prime.

It is a super-3 number, since 3×11311031130203³ (a number of 40 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11311031130403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 807930795008 + ... + 807930795021.

It is an arithmetic number, because the mean of its divisors is an integer number (3231723180060).

Almost surely, 2^{11311031130203} is an apocalyptic number.

11311031130203 is a deficient number, since it is larger than the sum of its proper divisors (1615861590037).

11311031130203 is an equidigital number, since it uses as much as digits as its factorization.

11311031130203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1615861590036.

The product of its (nonzero) digits is 162, while the sum is 20.

Adding to 11311031130203 its reverse (30203113011311), we get a palindrome (41514144141514).

The spelling of 11311031130203 in words is "eleven trillion, three hundred eleven billion, thirty-one million, one hundred thirty thousand, two hundred three".