11011121222111 has 4 divisors (see below), whose sum is σ = 11114028897192. Its totient is φ = 10908213547032.

The previous prime is 11011121222069. The next prime is 11011121222137. The reversal of 11011121222111 is 11122212111011.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11011121222111 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 11011121222111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011121222191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51453837380 + ... + 51453837593.

It is an arithmetic number, because the mean of its divisors is an integer number (2778507224298).

Almost surely, 2^{11011121222111} is an apocalyptic number.

11011121222111 is a deficient number, since it is larger than the sum of its proper divisors (102907675081).

11011121222111 is a wasteful number, since it uses less digits than its factorization.

11011121222111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102907675080.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 11011121222111 its reverse (11122212111011), we get a palindrome (22133333333122).

The spelling of 11011121222111 in words is "eleven trillion, eleven billion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred eleven".