1100100120221 has 4 divisors (see below), whose sum is σ = 1102843512444. Its totient is φ = 1097356728000.

The previous prime is 1100100120211. The next prime is 1100100120227. The reversal of 1100100120221 is 1220210010011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 996423204100 + 103676916121 = 998210^2 + 321989^2 .

It is a cyclic number.

It is not a de Polignac number, because 1100100120221 - 2¹⁰ = 1100100119197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100100120227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1371695510 + ... + 1371696311.

It is an arithmetic number, because the mean of its divisors is an integer number (275710878111).

Almost surely, 2^{1100100120221} is an apocalyptic number.

It is an amenable number.

1100100120221 is a deficient number, since it is larger than the sum of its proper divisors (2743392223).

1100100120221 is an equidigital number, since it uses as much as digits as its factorization.

1100100120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2743392222.

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

Adding to 1100100120221 its reverse (1220210010011), we get a palindrome (2320310130232).

The spelling of 1100100120221 in words is "one trillion, one hundred billion, one hundred million, one hundred twenty thousand, two hundred twenty-one".