1135440221 has 4 divisors (see below), whose sum is σ = 1135668000. Its totient is φ = 1135212444.

The previous prime is 1135440211. The next prime is 1135440259. The reversal of 1135440221 is 1220445311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1135440221 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 (1135440211) 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, 106241 + ... + 116438.

It is an arithmetic number, because the mean of its divisors is an integer number (283917000).

Almost surely, 2^1135440221 is an apocalyptic number.

It is an amenable number.

1135440221 is a deficient number, since it is larger than the sum of its proper divisors (227779).

1135440221 is an equidigital number, since it uses as much as digits as its factorization.

1135440221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227778.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1135440221 is about 33696.2938763301. The cubic root of 1135440221 is about 1043.2492746558.

Adding to 1135440221 its reverse (1220445311), we get a palindrome (2355885532).

The spelling of 1135440221 in words is "one billion, one hundred thirty-five million, four hundred forty thousand, two hundred twenty-one".