11311223009 has 4 divisors (see below), whose sum is σ = 11312143920. Its totient is φ = 11310302100.

The previous prime is 11311222999. The next prime is 11311223041. The reversal of 11311223009 is 90032211311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11311223009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11311223069) 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, 441779 + ... + 466680.

It is an arithmetic number, because the mean of its divisors is an integer number (2828035980).

Almost surely, 2^11311223009 is an apocalyptic number.

It is an amenable number.

11311223009 is a deficient number, since it is larger than the sum of its proper divisors (920911).

11311223009 is an equidigital number, since it uses as much as digits as its factorization.

11311223009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920910.

The product of its (nonzero) digits is 324, while the sum is 23.

The spelling of 11311223009 in words is "eleven billion, three hundred eleven million, two hundred twenty-three thousand, nine".