11212223111 has 4 divisors (see below), whose sum is σ = 11215203312. Its totient is φ = 11209242912.

The previous prime is 11212223063. The next prime is 11212223131. The reversal of 11212223111 is 11132221211.

It is a happy number.

11212223111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11212223111 - 2⁶ = 11212223047 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 11212223111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212223131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1484450 + ... + 1491983.

It is an arithmetic number, because the mean of its divisors is an integer number (2803800828).

Almost surely, 2^11212223111 is an apocalyptic number.

11212223111 is a deficient number, since it is larger than the sum of its proper divisors (2980201).

11212223111 is an equidigital number, since it uses as much as digits as its factorization.

11212223111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2980200.

The product of its digits is 48, while the sum is 17.

Adding to 11212223111 its reverse (11132221211), we get a palindrome (22344444322).

The spelling of 11212223111 in words is "eleven billion, two hundred twelve million, two hundred twenty-three thousand, one hundred eleven".