11201221112209 has 4 divisors (see below), whose sum is σ = 11243811306816. Its totient is φ = 11158630917604.

The previous prime is 11201221112203. The next prime is 11201221112243. The reversal of 11201221112209 is 90221112210211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11201221112209 - 2¹⁵ = 11201221079441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11201221112203) 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, 21295096909 + ... + 21295097434.

It is an arithmetic number, because the mean of its divisors is an integer number (2810952826704).

Almost surely, 2^{11201221112209} is an apocalyptic number.

It is an amenable number.

11201221112209 is a deficient number, since it is larger than the sum of its proper divisors (42590194607).

11201221112209 is an equidigital number, since it uses as much as digits as its factorization.

11201221112209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42590194606.

The product of its (nonzero) digits is 288, while the sum is 25.

The spelling of 11201221112209 in words is "eleven trillion, two hundred one billion, two hundred twenty-one million, one hundred twelve thousand, two hundred nine".