1103540221 has 6 divisors (see below), whose sum is σ = 1283710110. Its totient is φ = 945891576.

The previous prime is 1103540209. The next prime is 1103540239. The reversal of 1103540221 is 1220453011.

It can be written as a sum of positive squares in only one way, i.e., 797780025 + 305760196 = 28245^2 + 17486^2 .

It is not a de Polignac number, because 1103540221 - 2¹⁵ = 1103507453 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 (1103540021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11260566 + ... + 11260663.

It is an arithmetic number, because the mean of its divisors is an integer number (213951685).

Almost surely, 2^1103540221 is an apocalyptic number.

It is an amenable number.

1103540221 is a deficient number, since it is larger than the sum of its proper divisors (180169889).

1103540221 is an equidigital number, since it uses as much as digits as its factorization.

1103540221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22521243 (or 22521236 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1103540221 is about 33219.5758702606. The cubic root of 1103540221 is about 1033.3863537022.

Adding to 1103540221 its reverse (1220453011), we get a palindrome (2323993232).

The spelling of 1103540221 in words is "one billion, one hundred three million, five hundred forty thousand, two hundred twenty-one".