11112121111211 has 8 divisors (see below), whose sum is σ = 11120684509200. Its totient is φ = 11103558301440.

The previous prime is 11112121111193. The next prime is 11112121111243. The reversal of 11112121111211 is 11211112121111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11112121111211 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 11112121111211.

It is not an unprimeable number, because it can be changed into a prime (11112121311211) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 42358295 + ... + 42619823.

It is an arithmetic number, because the mean of its divisors is an integer number (1390085563650).

Almost surely, 2^{11112121111211} is an apocalyptic number.

11112121111211 is a deficient number, since it is larger than the sum of its proper divisors (8563397989).

11112121111211 is a wasteful number, since it uses less digits than its factorization.

11112121111211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294109.

The product of its digits is 8, while the sum is 17.

Adding to 11112121111211 its reverse (11211112121111), we get a palindrome (22323233232322).

The spelling of 11112121111211 in words is "eleven trillion, one hundred twelve billion, one hundred twenty-one million, one hundred eleven thousand, two hundred eleven".