1111111033121 has 16 divisors (see below), whose sum is σ = 1225339023360. Its totient is φ = 1003471500240.

The previous prime is 1111111033117. The next prime is 1111111033297. The reversal of 1111111033121 is 1213301111111.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1111111033121 - 2² = 1111111033117 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 1111111033121.

It is not an unprimeable number, because it can be changed into a prime (1111111033621) 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, 14038421 + ... + 14117346.

It is an arithmetic number, because the mean of its divisors is an integer number (76583688960).

Almost surely, 2^{1111111033121} is an apocalyptic number.

It is an amenable number.

1111111033121 is a deficient number, since it is larger than the sum of its proper divisors (114227990239).

1111111033121 is a wasteful number, since it uses less digits than its factorization.

1111111033121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28155884.

The product of its (nonzero) digits is 18, while the sum is 17.

Adding to 1111111033121 its reverse (1213301111111), we get a palindrome (2324412144232).

The spelling of 1111111033121 in words is "one trillion, one hundred eleven billion, one hundred eleven million, thirty-three thousand, one hundred twenty-one".