1100011001021 has 2 divisors, whose sum is σ = 1100011001022. Its totient is φ = 1100011001020.

The previous prime is 1100011000999. The next prime is 1100011001059. The reversal of 1100011001021 is 1201001100011.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1073739453796 + 26271547225 = 1036214^2 + 162085^2 .

It is a cyclic number.

It is not a de Polignac number, because 1100011001021 - 2¹⁸ = 1100010738877 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1100011601021) 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 as a sum of consecutive naturals, namely, 550005500510 + 550005500511.

It is an arithmetic number, because the mean of its divisors is an integer number (550005500511).

Almost surely, 2^{1100011001021} is an apocalyptic number.

It is an amenable number.

1100011001021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1100011001021 is an equidigital number, since it uses as much as digits as its factorization.

1100011001021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 1100011001021 its reverse (1201001100011), we get a palindrome (2301012101032).

The spelling of 1100011001021 in words is "one trillion, one hundred billion, eleven million, one thousand, twenty-one".