11111012222111 has 4 divisors (see below), whose sum is σ = 11111019725400. Its totient is φ = 11111004718824.

The previous prime is 11111012222077. The next prime is 11111012222113. The reversal of 11111012222111 is 11122221011111.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 11111012222111 - 2⁶ = 11111012222047 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 11111012222111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111012222113) 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, 706541 + ... + 4766678.

It is an arithmetic number, because the mean of its divisors is an integer number (2777754931350).

Almost surely, 2^{11111012222111} is an apocalyptic number.

11111012222111 is a deficient number, since it is larger than the sum of its proper divisors (7503289).

11111012222111 is an equidigital number, since it uses as much as digits as its factorization.

11111012222111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7503288.

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

Adding to 11111012222111 its reverse (11122221011111), we get a palindrome (22233233233222).

The spelling of 11111012222111 in words is "eleven trillion, one hundred eleven billion, twelve million, two hundred twenty-two thousand, one hundred eleven".