1111221112111 has 16 divisors (see below), whose sum is σ = 1236517113600. Its totient is φ = 990122633280.

The previous prime is 1111221112093. The next prime is 1111221112117. The reversal of 1111221112111 is 1112111221111.

It is not a de Polignac number, because 1111221112111 - 2⁹ = 1111221111599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111221112117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3641686 + ... + 3935011.

It is an arithmetic number, because the mean of its divisors is an integer number (77282319600).

Almost surely, 2^{1111221112111} is an apocalyptic number.

1111221112111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1111221112111 is a deficient number, since it is larger than the sum of its proper divisors (125296001489).

1111221112111 is a wasteful number, since it uses less digits than its factorization.

1111221112111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7576974.

The product of its digits is 8, while the sum is 16.

Adding to 1111221112111 its reverse (1112111221111), we get a palindrome (2223332333222).

The spelling of 1111221112111 in words is "one trillion, one hundred eleven billion, two hundred twenty-one million, one hundred twelve thousand, one hundred eleven".