1121156105 has 4 divisors (see below), whose sum is σ = 1345387332. Its totient is φ = 896924880.

The previous prime is 1121156093. The next prime is 1121156131. The reversal of 1121156105 is 5016511211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 874917241 + 246238864 = 29579^2 + 15692^2 .

It is not a de Polignac number, because 1121156105 - 2¹⁰ = 1121155081 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112115606 + ... + 112115615.

It is an arithmetic number, because the mean of its divisors is an integer number (336346833).

Almost surely, 2^1121156105 is an apocalyptic number.

It is an amenable number.

1121156105 is a deficient number, since it is larger than the sum of its proper divisors (224231227).

1121156105 is an equidigital number, since it uses as much as digits as its factorization.

1121156105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224231226.

The product of its (nonzero) digits is 300, while the sum is 23.

The square root of 1121156105 is about 33483.6692284463. The cubic root of 1121156105 is about 1038.8560229921.

Adding to 1121156105 its reverse (5016511211), we get a palindrome (6137667316).

The spelling of 1121156105 in words is "one billion, one hundred twenty-one million, one hundred fifty-six thousand, one hundred five".