11000012020021 has 4 divisors (see below), whose sum is σ = 11016857368332. Its totient is φ = 10983166671712.

The previous prime is 11000012019947. The next prime is 11000012020033. The reversal of 11000012020021 is 12002021000011.

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 5445623619396 + 5554388400625 = 2333586^2 + 2356775^2 .

It is a cyclic number.

It is not a de Polignac number, because 11000012020021 - 2³⁷ = 10862573066549 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 (11000012026021) 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, 8422673176 + ... + 8422674481.

It is an arithmetic number, because the mean of its divisors is an integer number (2754214342083).

Almost surely, 2^{11000012020021} is an apocalyptic number.

It is an amenable number.

11000012020021 is a deficient number, since it is larger than the sum of its proper divisors (16845348311).

11000012020021 is an equidigital number, since it uses as much as digits as its factorization.

11000012020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16845348310.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 11000012020021 its reverse (12002021000011), we get a palindrome (23002033020032).

The spelling of 11000012020021 in words is "eleven trillion, twelve million, twenty thousand, twenty-one".