11111121208 has 48 divisors (see below), whose sum is σ = 23274994680. Its totient is φ = 4967688000.

The previous prime is 11111121193. The next prime is 11111121209. The reversal of 11111121208 is 80212111111.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111121209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35038 + ... + 153133.

Almost surely, 2^11111121208 is an apocalyptic number.

It is an amenable number.

11111121208 is an abundant number, since it is smaller than the sum of its proper divisors (12163873472).

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

11111121208 is a wasteful number, since it uses less digits than its factorization.

11111121208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188260 (or 188245 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 11111121208 its reverse (80212111111), we get a palindrome (91323232319).

The spelling of 11111121208 in words is "eleven billion, one hundred eleven million, one hundred twenty-one thousand, two hundred eight".