1113021209 has 4 divisors (see below), whose sum is σ = 1120491300. Its totient is φ = 1105551120.

The previous prime is 1113021191. The next prime is 1113021223. The reversal of 1113021209 is 9021203111.

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 688537600 + 424483609 = 26240^2 + 20603^2 .

It is a cyclic number.

It is not a de Polignac number, because 1113021209 - 2¹⁶ = 1112955673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1113021409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3734822 + ... + 3735119.

It is an arithmetic number, because the mean of its divisors is an integer number (280122825).

Almost surely, 2^1113021209 is an apocalyptic number.

It is an amenable number.

1113021209 is a deficient number, since it is larger than the sum of its proper divisors (7470091).

1113021209 is an equidigital number, since it uses as much as digits as its factorization.

1113021209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7470090.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 1113021209 is about 33361.9724986398. The cubic root of 1113021209 is about 1036.3373407010.

The spelling of 1113021209 in words is "one billion, one hundred thirteen million, twenty-one thousand, two hundred nine".