1121065501 has 4 divisors (see below), whose sum is σ = 1148408604. Its totient is φ = 1093722400.

The previous prime is 1121065481. The next prime is 1121065511. The reversal of 1121065501 is 1055601211.

It is a happy number.

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 640140601 + 480924900 = 25301^2 + 21930^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121065501 - 2⁵ = 1121065469 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 (1121065511) 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 3 ways as a sum of consecutive naturals, for example, 13671490 + ... + 13671571.

It is an arithmetic number, because the mean of its divisors is an integer number (287102151).

Almost surely, 2^1121065501 is an apocalyptic number.

It is an amenable number.

1121065501 is a deficient number, since it is larger than the sum of its proper divisors (27343103).

1121065501 is an equidigital number, since it uses as much as digits as its factorization.

1121065501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27343102.

The product of its (nonzero) digits is 300, while the sum is 22.

The square root of 1121065501 is about 33482.3162430558. The cubic root of 1121065501 is about 1038.8280378774.

Adding to 1121065501 its reverse (1055601211), we get a palindrome (2176666712).

The spelling of 1121065501 in words is "one billion, one hundred twenty-one million, sixty-five thousand, five hundred one".