211411121111 has 4 divisors (see below), whose sum is σ = 218701159800. Its totient is φ = 204121082424.

The previous prime is 211411121107. The next prime is 211411121137. The reversal of 211411121111 is 111121114112.

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 211411121111 - 2² = 211411121107 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 211411121111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211411127111) 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, 3645019301 + ... + 3645019358.

It is an arithmetic number, because the mean of its divisors is an integer number (54675289950).

Almost surely, 2^211411121111 is an apocalyptic number.

211411121111 is a deficient number, since it is larger than the sum of its proper divisors (7290038689).

211411121111 is an equidigital number, since it uses as much as digits as its factorization.

211411121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7290038688.

The product of its digits is 16, while the sum is 17.

Adding to 211411121111 its reverse (111121114112), we get a palindrome (322532235223).

The spelling of 211411121111 in words is "two hundred eleven billion, four hundred eleven million, one hundred twenty-one thousand, one hundred eleven".