11001001200221 has 4 divisors (see below), whose sum is σ = 11001733980252. Its totient is φ = 11000268420192.

The previous prime is 11001001200187. The next prime is 11001001200227. The reversal of 11001001200221 is 12200210010011.

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 10012547676121 + 988453524100 = 3164261^2 + 994210^2 .

It is a cyclic number.

It is not a de Polignac number, because 11001001200221 - 2¹⁰ = 11001001199197 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 (11001001200227) 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, 366367496 + ... + 366397521.

It is an arithmetic number, because the mean of its divisors is an integer number (2750433495063).

Almost surely, 2^{11001001200221} is an apocalyptic number.

It is an amenable number.

11001001200221 is a deficient number, since it is larger than the sum of its proper divisors (732780031).

11001001200221 is an equidigital number, since it uses as much as digits as its factorization.

11001001200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732780030.

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

Adding to 11001001200221 its reverse (12200210010011), we get a palindrome (23201211210232).

The spelling of 11001001200221 in words is "eleven trillion, one billion, one million, two hundred thousand, two hundred twenty-one".