11211201220211 has 4 divisors (see below), whose sum is σ = 11364779319192. Its totient is φ = 11057623121232.

The previous prime is 11211201220207. The next prime is 11211201220321. The reversal of 11211201220211 is 11202210211211.

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 11211201220211 - 2² = 11211201220207 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 11211201220211.

It is not an unprimeable number, because it can be changed into a prime (11211201220201) 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, 76789049381 + ... + 76789049526.

It is an arithmetic number, because the mean of its divisors is an integer number (2841194829798).

Almost surely, 2^{11211201220211} is an apocalyptic number.

11211201220211 is a deficient number, since it is larger than the sum of its proper divisors (153578098981).

11211201220211 is an equidigital number, since it uses as much as digits as its factorization.

11211201220211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153578098980.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 11211201220211 its reverse (11202210211211), we get a palindrome (22413411431422).

The spelling of 11211201220211 in words is "eleven trillion, two hundred eleven billion, two hundred one million, two hundred twenty thousand, two hundred eleven".