11124212111 has 4 divisors (see below), whose sum is σ = 11127701424. Its totient is φ = 11120722800.

The previous prime is 11124212107. The next prime is 11124212119. The reversal of 11124212111 is 11121242111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11124212111 - 2² = 11124212107 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11124212111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11124212119) 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, 1739870 + ... + 1746251.

It is an arithmetic number, because the mean of its divisors is an integer number (2781925356).

Almost surely, 2^11124212111 is an apocalyptic number.

11124212111 is a deficient number, since it is larger than the sum of its proper divisors (3489313).

11124212111 is an equidigital number, since it uses as much as digits as its factorization.

11124212111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3489312.

The product of its digits is 32, while the sum is 17.

Adding to 11124212111 its reverse (11121242111), we get a palindrome (22245454222).

The spelling of 11124212111 in words is "eleven billion, one hundred twenty-four million, two hundred twelve thousand, one hundred eleven".