11200111121 has 4 divisors (see below), whose sum is σ = 11280687600. Its totient is φ = 11119534644.

The previous prime is 11200111063. The next prime is 11200111123. The reversal of 11200111121 is 12111100211.

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-11200111121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11200111123) 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 3 ways as a sum of consecutive naturals, for example, 40288031 + ... + 40288308.

It is an arithmetic number, because the mean of its divisors is an integer number (2820171900).

Almost surely, 2^11200111121 is an apocalyptic number.

It is an amenable number.

11200111121 is a deficient number, since it is larger than the sum of its proper divisors (80576479).

11200111121 is an equidigital number, since it uses as much as digits as its factorization.

11200111121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80576478.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 11200111121 its reverse (12111100211), we get a palindrome (23311211332).

The spelling of 11200111121 in words is "eleven billion, two hundred million, one hundred eleven thousand, one hundred twenty-one".