1100110021 has 4 divisors (see below), whose sum is σ = 1100298112. Its totient is φ = 1099921932.

The previous prime is 1100110007. The next prime is 1100110049. The reversal of 1100110021 is 1200110011.

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 not a de Polignac number, because 1100110021 - 2¹¹ = 1100107973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1100109986 and 1100110013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100110321) 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, 84981 + ... + 97066.

It is an arithmetic number, because the mean of its divisors is an integer number (275074528).

Almost surely, 2^1100110021 is an apocalyptic number.

It is an amenable number.

1100110021 is a deficient number, since it is larger than the sum of its proper divisors (188091).

1100110021 is an equidigital number, since it uses as much as digits as its factorization.

1100110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188090.

The product of its (nonzero) digits is 2, while the sum is 7.

The square root of 1100110021 is about 33167.9064910645. The cubic root of 1100110021 is about 1032.3145302153.

Adding to 1100110021 its reverse (1200110011), we get a palindrome (2300220032).

The spelling of 1100110021 in words is "one billion, one hundred million, one hundred ten thousand, twenty-one".