11221121223211 has 4 divisors (see below), whose sum is σ = 11270121752800. Its totient is φ = 11172120693624.

The previous prime is 11221121223209. The next prime is 11221121223217. The reversal of 11221121223211 is 11232212112211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11221121223211 - 2¹ = 11221121223209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11221121223217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24500264451 + ... + 24500264908.

It is an arithmetic number, because the mean of its divisors is an integer number (2817530438200).

Almost surely, 2^{11221121223211} is an apocalyptic number.

11221121223211 is a deficient number, since it is larger than the sum of its proper divisors (49000529589).

11221121223211 is an equidigital number, since it uses as much as digits as its factorization.

11221121223211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49000529588.

The product of its digits is 192, while the sum is 22.

Adding to 11221121223211 its reverse (11232212112211), we get a palindrome (22453333335422).

The spelling of 11221121223211 in words is "eleven trillion, two hundred twenty-one billion, one hundred twenty-one million, two hundred twenty-three thousand, two hundred eleven".