1100100021 has 8 divisors (see below), whose sum is σ = 1506443424. Its totient is φ = 713578320.

The previous prime is 1100099993. The next prime is 1100100041. The reversal of 1100100021 is 1200010011.

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

It is not a de Polignac number, because 1100100021 - 2⁷ = 1100099893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1100099982 and 1100100009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100100041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4955295 + ... + 4955516.

It is an arithmetic number, because the mean of its divisors is an integer number (188305428).

Almost surely, 2^1100100021 is an apocalyptic number.

It is an amenable number.

1100100021 is a deficient number, since it is larger than the sum of its proper divisors (406343403).

1100100021 is an equidigital number, since it uses as much as digits as its factorization.

1100100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9910851.

The product of its (nonzero) digits is 2, while the sum is 6.

The square root of 1100100021 is about 33167.7557425883. The cubic root of 1100100021 is about 1032.3114022928.

Adding to 1100100021 its reverse (1200010011), we get a palindrome (2300110032).

The spelling of 1100100021 in words is "one billion, one hundred million, one hundred thousand, twenty-one".