1103040021 has 8 divisors (see below), whose sum is σ = 1472107840. Its totient is φ = 734666112.

The previous prime is 1103040017. The next prime is 1103040061. The reversal of 1103040021 is 1200403011.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1103040021 - 2² = 1103040017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1103039979 and 1103040006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1103040061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169756 + ... + 176133.

It is an arithmetic number, because the mean of its divisors is an integer number (184013480).

Almost surely, 2^1103040021 is an apocalyptic number.

It is an amenable number.

1103040021 is a deficient number, since it is larger than the sum of its proper divisors (369067819).

1103040021 is a wasteful number, since it uses less digits than its factorization.

1103040021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346955.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1103040021 is about 33212.0463235857. The cubic root of 1103040021 is about 1033.2301962850.

Adding to 1103040021 its reverse (1200403011), we get a palindrome (2303443032).

The spelling of 1103040021 in words is "one billion, one hundred three million, forty thousand, twenty-one".