11212221102209 has 4 divisors (see below), whose sum is σ = 11871763520004. Its totient is φ = 10552678684416.

The previous prime is 11212221102197. The next prime is 11212221102233. The reversal of 11212221102209 is 90220112221211.

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 4279532102209 + 6932689000000 = 2068703^2 + 2633000^2 .

It is a cyclic number.

It is not a de Polignac number, because 11212221102209 - 2⁴ = 11212221102193 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11212221162209) 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, 329771208872 + ... + 329771208905.

It is an arithmetic number, because the mean of its divisors is an integer number (2967940880001).

Almost surely, 2^{11212221102209} is an apocalyptic number.

It is an amenable number.

11212221102209 is a deficient number, since it is larger than the sum of its proper divisors (659542417795).

11212221102209 is an equidigital number, since it uses as much as digits as its factorization.

11212221102209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659542417794.

The product of its (nonzero) digits is 576, while the sum is 26.

The spelling of 11212221102209 in words is "eleven trillion, two hundred twelve billion, two hundred twenty-one million, one hundred two thousand, two hundred nine".