1103021009 has 4 divisors (see below), whose sum is σ = 1103274816. Its totient is φ = 1102767204.

The previous prime is 1103020999. The next prime is 1103021027. The reversal of 1103021009 is 9001203011.

It is a happy number.

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-1103021009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1103021039) 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, 120269 + ... + 129114.

It is an arithmetic number, because the mean of its divisors is an integer number (275818704).

Almost surely, 2^1103021009 is an apocalyptic number.

It is an amenable number.

1103021009 is a deficient number, since it is larger than the sum of its proper divisors (253807).

1103021009 is an equidigital number, since it uses as much as digits as its factorization.

1103021009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253806.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 1103021009 is about 33211.7601009040. The cubic root of 1103021009 is about 1033.2242599983.

The spelling of 1103021009 in words is "one billion, one hundred three million, twenty-one thousand, nine".