11001200221021 has 4 divisors (see below), whose sum is σ = 11007839450332. Its totient is φ = 10994560991712.

The previous prime is 11001200220979. The next prime is 11001200221049. The reversal of 11001200221021 is 12012200210011.

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 5091390600921 + 5909809620100 = 2256411^2 + 2431010^2 .

It is a cyclic number.

It is not a de Polignac number, because 11001200221021 - 2⁷ = 11001200220893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11001200220992 and 11001200221010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11001200221321) 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, 3319612170 + ... + 3319615483.

It is an arithmetic number, because the mean of its divisors is an integer number (2751959862583).

Almost surely, 2^{11001200221021} is an apocalyptic number.

It is an amenable number.

11001200221021 is a deficient number, since it is larger than the sum of its proper divisors (6639229311).

11001200221021 is an equidigital number, since it uses as much as digits as its factorization.

11001200221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6639229310.

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

Adding to 11001200221021 its reverse (12012200210011), we get a palindrome (23013400431032).

The spelling of 11001200221021 in words is "eleven trillion, one billion, two hundred million, two hundred twenty-one thousand, twenty-one".