11011021222009 has 4 divisors (see below), whose sum is σ = 11011030418340. Its totient is φ = 11011012025680.

The previous prime is 11011021221983. The next prime is 11011021222027. The reversal of 11011021222009 is 90022212011011.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 7739679792784 + 3271341429225 = 2782028^2 + 1808685^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11011021222009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11011021222049) 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, 2475562 + ... + 5305699.

It is an arithmetic number, because the mean of its divisors is an integer number (2752757604585).

Almost surely, 2^{11011021222009} is an apocalyptic number.

It is an amenable number.

11011021222009 is a deficient number, since it is larger than the sum of its proper divisors (9196331).

11011021222009 is an equidigital number, since it uses as much as digits as its factorization.

11011021222009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9196330.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 11011021222009 in words is "eleven trillion, eleven billion, twenty-one million, two hundred twenty-two thousand, nine".