1100221100021 has 4 divisors (see below), whose sum is σ = 1100492696544. Its totient is φ = 1099949503500.

The previous prime is 1100221100003. The next prime is 1100221100047. The reversal of 1100221100021 is 1200011220011.

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 1100221100021 - 2¹⁰ = 1100221098997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1100221099975 and 1100221100011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100221100071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135792185 + ... + 135800286.

It is an arithmetic number, because the mean of its divisors is an integer number (275123174136).

Almost surely, 2^{1100221100021} is an apocalyptic number.

It is an amenable number.

1100221100021 is a deficient number, since it is larger than the sum of its proper divisors (271596523).

1100221100021 is an equidigital number, since it uses as much as digits as its factorization.

1100221100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271596522.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1100221100021 its reverse (1200011220011), we get a palindrome (2300232320032).

The spelling of 1100221100021 in words is "one trillion, one hundred billion, two hundred twenty-one million, one hundred thousand, twenty-one".