11112222120211 has 4 divisors (see below), whose sum is σ = 11112899009512. Its totient is φ = 11111545230912.

The previous prime is 11112222120193. The next prime is 11112222120217. The reversal of 11112222120211 is 11202122221111.

It is a happy number.

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 11112222120211 - 2⁵ = 11112222120179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11112222120217) 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, 338420025 + ... + 338452858.

It is an arithmetic number, because the mean of its divisors is an integer number (2778224752378).

Almost surely, 2^{11112222120211} is an apocalyptic number.

11112222120211 is a deficient number, since it is larger than the sum of its proper divisors (676889301).

11112222120211 is an equidigital number, since it uses as much as digits as its factorization.

11112222120211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676889300.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 11112222120211 its reverse (11202122221111), we get a palindrome (22314344341322).

The spelling of 11112222120211 in words is "eleven trillion, one hundred twelve billion, two hundred twenty-two million, one hundred twenty thousand, two hundred eleven".