1121111121 has 16 divisors (see below), whose sum is σ = 1704495744. Its totient is φ = 649330944.

The previous prime is 1121111119. The next prime is 1121111161. The reversal of 1121111121 is 1211111211.

It is not a de Polignac number, because 1121111121 - 2¹ = 1121111119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1121111097 and 1121111106.

It is not an unprimeable number, because it can be changed into a prime (1121111111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 844821 + ... + 846146.

It is an arithmetic number, because the mean of its divisors is an integer number (106530984).

Almost surely, 2^1121111121 is an apocalyptic number.

It is an amenable number.

1121111121 is a deficient number, since it is larger than the sum of its proper divisors (583384623).

1121111121 is a wasteful number, since it uses less digits than its factorization.

1121111121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1691000.

The product of its digits is 4, while the sum is 12.

The square root of 1121111121 is about 33482.9974912641. The cubic root of 1121111121 is about 1038.8421288448.

Adding to 1121111121 its reverse (1211111211), we get a palindrome (2332222332).

The spelling of 1121111121 in words is "one billion, one hundred twenty-one million, one hundred eleven thousand, one hundred twenty-one".