1100044021 has 8 divisors (see below), whose sum is σ = 1136935424. Its totient is φ = 1063240560.

The previous prime is 1100044019. The next prime is 1100044031. The reversal of 1100044021 is 1204400011.

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

It is a cyclic number.

It is not a de Polignac number, because 1100044021 - 2¹ = 1100044019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1100043992 and 1100044010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100044031) 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, 3955 + ... + 47071.

It is an arithmetic number, because the mean of its divisors is an integer number (142116928).

Almost surely, 2^1100044021 is an apocalyptic number.

It is an amenable number.

1100044021 is a deficient number, since it is larger than the sum of its proper divisors (36891403).

1100044021 is an equidigital number, since it uses as much as digits as its factorization.

1100044021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43971.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1100044021 is about 33166.9115384595. The cubic root of 1100044021 is about 1032.2938855766.

Adding to 1100044021 its reverse (1204400011), we get a palindrome (2304444032).

The spelling of 1100044021 in words is "one billion, one hundred million, forty-four thousand, twenty-one".