2211311111111 has 4 divisors (see below), whose sum is σ = 2341388235312. Its totient is φ = 2081233986912.

The previous prime is 2211311111071. The next prime is 2211311111129. The reversal of 2211311111111 is 1111111131122.

2211311111111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2211311111111 - 2³⁰ = 2210237369287 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 130077124183 = 2211311111111 / (2 + 2 + 1 + 1 + 3 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1).

It is a Duffinian number.

2211311111111 is a modest number, since divided by 1111111 gives 221131 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 2211311111111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211311111311) 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, 65038562075 + ... + 65038562108.

It is an arithmetic number, because the mean of its divisors is an integer number (585347058828).

Almost surely, 2^{2211311111111} is an apocalyptic number.

2211311111111 is a deficient number, since it is larger than the sum of its proper divisors (130077124201).

2211311111111 is a wasteful number, since it uses less digits than its factorization.

2211311111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130077124200.

The product of its digits is 12, while the sum is 17.

Adding to 2211311111111 its reverse (1111111131122), we get a palindrome (3322422242233).

The spelling of 2211311111111 in words is "two trillion, two hundred eleven billion, three hundred eleven million, one hundred eleven thousand, one hundred eleven".