1121111289 has 9 divisors (see below), whose sum is σ = 1619528079. Its totient is φ = 747340560.

The previous prime is 1121111267. The next prime is 1121111293. The reversal of 1121111289 is 9821111211.

The square root of 1121111289 is 33483.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 24176889 + 1096934400 = 4917^2 + 33120^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 1121111289 - 2⁷ = 1121111161 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1121111209) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 94869 + ... + 106029.

Almost surely, 2^1121111289 is an apocalyptic number.

1121111289 is the 33483-rd square number.

1121111289 is the 16742-nd centered octagonal number.

It is an amenable number.

1121111289 is a deficient number, since it is larger than the sum of its proper divisors (498416790).

1121111289 is an frugal number, since it uses more digits than its factorization.

1121111289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22328 (or 11164 counting only the distinct ones).

The product of its digits is 288, while the sum is 27.

The cubic root of 1121111289 is about 1038.8421807354.

It can be divided in two parts, 11211 and 11289, that added together give a square (22500 = 150²).

The spelling of 1121111289 in words is "one billion, one hundred twenty-one million, one hundred eleven thousand, two hundred eighty-nine".