11000122212221 has 8 divisors (see below), whose sum is σ = 11123866346040. Its totient is φ = 10876381350912.

The previous prime is 11000122212199. The next prime is 11000122212257. The reversal of 11000122212221 is 12221222100011.

It can be written as a sum of positive squares in 4 ways, for example, as 4184524363321 + 6815597848900 = 2045611^2 + 2610670^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11000122212221 - 2²⁶ = 11000055103357 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11000122212221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11000122202221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6287591 + ... + 7844363.

It is an arithmetic number, because the mean of its divisors is an integer number (1390483293255).

Almost surely, 2^{11000122212221} is an apocalyptic number.

It is an amenable number.

11000122212221 is a deficient number, since it is larger than the sum of its proper divisors (123744133819).

11000122212221 is an equidigital number, since it uses as much as digits as its factorization.

11000122212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1636255.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 11000122212221 its reverse (12221222100011), we get a palindrome (23221344312232).

The spelling of 11000122212221 in words is "eleven trillion, one hundred twenty-two million, two hundred twelve thousand, two hundred twenty-one".