11131223208 has 64 divisors (see below), whose sum is σ = 32543132160. Its totient is φ = 3106385856.

The previous prime is 11131223171. The next prime is 11131223237. The reversal of 11131223208 is 80232213111.

It is a super-2 number, since 2×11131223208² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 763210 + ... + 777657.

It is an arithmetic number, because the mean of its divisors is an integer number (508486440).

Almost surely, 2^11131223208 is an apocalyptic number.

It is an amenable number.

11131223208 is an abundant number, since it is smaller than the sum of its proper divisors (21411908952).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11131223208 is a wasteful number, since it uses less digits than its factorization.

11131223208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1540926 (or 1540922 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

Adding to 11131223208 its reverse (80232213111), we get a palindrome (91363436319).

The spelling of 11131223208 in words is "eleven billion, one hundred thirty-one million, two hundred twenty-three thousand, two hundred eight".