11121200200021 has 4 divisors (see below), whose sum is σ = 11121247424844. Its totient is φ = 11121152975200.

The previous prime is 11121200200009. The next prime is 11121200200027. The reversal of 11121200200021 is 12000200212111.

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 3393383988996 + 7727816211025 = 1842114^2 + 2779895^2 .

It is a cyclic number.

It is not a de Polignac number, because 11121200200021 - 2³⁹ = 10571444386133 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11121200199974 and 11121200200010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121200200027) 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, 23257390 + ... + 23730751.

It is an arithmetic number, because the mean of its divisors is an integer number (2780311856211).

Almost surely, 2^{11121200200021} is an apocalyptic number.

It is an amenable number.

11121200200021 is a deficient number, since it is larger than the sum of its proper divisors (47224823).

11121200200021 is an equidigital number, since it uses as much as digits as its factorization.

11121200200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47224822.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 11121200200021 its reverse (12000200212111), we get a palindrome (23121400412132).

The spelling of 11121200200021 in words is "eleven trillion, one hundred twenty-one billion, two hundred million, two hundred thousand, twenty-one".