1100041021 has 4 divisors (see below), whose sum is σ = 1137973500. Its totient is φ = 1062108544.

The previous prime is 1100041001. The next prime is 1100041031. The reversal of 1100041021 is 1201400011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1201400011 = 7 ⋅171628573.

It can be written as a sum of positive squares in 2 ways, for example, as 735765625 + 364275396 = 27125^2 + 19086^2 .

It is a cyclic number.

It is not a de Polignac number, because 1100041021 - 2⁵ = 1100040989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1100040989 and 1100041007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100041001) 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, 18966196 + ... + 18966253.

It is an arithmetic number, because the mean of its divisors is an integer number (284493375).

Almost surely, 2^1100041021 is an apocalyptic number.

It is an amenable number.

1100041021 is a deficient number, since it is larger than the sum of its proper divisors (37932479).

1100041021 is an equidigital number, since it uses as much as digits as its factorization.

1100041021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37932478.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1100041021 is about 33166.8663126319. The cubic root of 1100041021 is about 1032.2929471643.

Adding to 1100041021 its reverse (1201400011), we get a palindrome (2301441032).

The spelling of 1100041021 in words is "one billion, one hundred million, forty-one thousand, twenty-one".