1140330221 has 4 divisors (see below), whose sum is σ = 1140545244. Its totient is φ = 1140115200.

The previous prime is 1140330209. The next prime is 1140330223. The reversal of 1140330221 is 1220330411.

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 419676196 + 720654025 = 20486^2 + 26845^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1140330221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1140330221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1140330223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99350 + ... + 110231.

It is an arithmetic number, because the mean of its divisors is an integer number (285136311).

Almost surely, 2^1140330221 is an apocalyptic number.

It is an amenable number.

1140330221 is a deficient number, since it is larger than the sum of its proper divisors (215023).

1140330221 is an equidigital number, since it uses as much as digits as its factorization.

1140330221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215022.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1140330221 is about 33768.7758291591. The cubic root of 1140330221 is about 1044.7447835648.

Adding to 1140330221 its reverse (1220330411), we get a palindrome (2360660632).

The spelling of 1140330221 in words is "one billion, one hundred forty million, three hundred thirty thousand, two hundred twenty-one".