11203131009 has 8 divisors (see below), whose sum is σ = 17071437760. Its totient is φ = 6401789136.

The previous prime is 11203131001. The next prime is 11203131031. The reversal of 11203131009 is 90013130211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11203131009 - 2³ = 11203131001 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 533482429 = 11203131009 / (1 + 1 + 2 + 0 + 3 + 1 + 3 + 1 + 0 + 0 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11203131001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 266741194 + ... + 266741235.

It is an arithmetic number, because the mean of its divisors is an integer number (2133929720).

Almost surely, 2^11203131009 is an apocalyptic number.

It is an amenable number.

11203131009 is a deficient number, since it is larger than the sum of its proper divisors (5868306751).

11203131009 is an equidigital number, since it uses as much as digits as its factorization.

11203131009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533482439.

The product of its (nonzero) digits is 162, while the sum is 21.

The spelling of 11203131009 in words is "eleven billion, two hundred three million, one hundred thirty-one thousand, nine".