1121366065 has 4 divisors (see below), whose sum is σ = 1345639284. Its totient is φ = 897092848.

The previous prime is 1121366039. The next prime is 1121366101. The reversal of 1121366065 is 5606631211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5606631211 = 1049 ⋅5344739.

It can be written as a sum of positive squares in 2 ways, for example, as 176172529 + 945193536 = 13273^2 + 30744^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121366065 - 2¹⁷ = 1121234993 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 112136602 + ... + 112136611.

It is an arithmetic number, because the mean of its divisors is an integer number (336409821).

Almost surely, 2^1121366065 is an apocalyptic number.

It is an amenable number.

1121366065 is a deficient number, since it is larger than the sum of its proper divisors (224273219).

1121366065 is an equidigital number, since it uses as much as digits as its factorization.

1121366065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224273218.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 1121366065 is about 33486.8043414119. The cubic root of 1121366065 is about 1038.9208681388.

Adding to 1121366065 its reverse (5606631211), we get a palindrome (6727997276).

The spelling of 1121366065 in words is "one billion, one hundred twenty-one million, three hundred sixty-six thousand, sixty-five".