11111121133 has 16 divisors (see below), whose sum is σ = 12920549760. Its totient is φ = 9357397056.

The previous prime is 11111121121. The next prime is 11111121173. The reversal of 11111121133 is 33112111111.

It is not a de Polignac number, because 11111121133 - 2¹⁷ = 11110990061 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 (11111121173) 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, 907891 + ... + 920047.

It is an arithmetic number, because the mean of its divisors is an integer number (807534360).

Almost surely, 2^11111121133 is an apocalyptic number.

It is an amenable number.

11111121133 is a deficient number, since it is larger than the sum of its proper divisors (1809428627).

11111121133 is a wasteful number, since it uses less digits than its factorization.

11111121133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14436.

The product of its digits is 18, while the sum is 16.

Adding to 11111121133 its reverse (33112111111), we get a palindrome (44223232244).

The spelling of 11111121133 in words is "eleven billion, one hundred eleven million, one hundred twenty-one thousand, one hundred thirty-three".