2111101211 has 4 divisors (see below), whose sum is σ = 2160196632. Its totient is φ = 2062005792.

The previous prime is 2111101171. The next prime is 2111101217. The reversal of 2111101211 is 1121011112.

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 2111101211 - 2¹⁴ = 2111084827 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2111101192 and 2111101201.

It is not an unprimeable number, because it can be changed into a prime (2111101217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24547646 + ... + 24547731.

It is an arithmetic number, because the mean of its divisors is an integer number (540049158).

Almost surely, 2^2111101211 is an apocalyptic number.

2111101211 is a deficient number, since it is larger than the sum of its proper divisors (49095421).

2111101211 is an equidigital number, since it uses as much as digits as its factorization.

2111101211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49095420.

The product of its (nonzero) digits is 4, while the sum is 11.

The square root of 2111101211 is about 45946.7214390755. The cubic root of 2111101211 is about 1282.8317051283.

Adding to 2111101211 its reverse (1121011112), we get a palindrome (3232112323).

Subtracting from 2111101211 its reverse (1121011112), we obtain a palindrome (990090099).

The spelling of 2111101211 in words is "two billion, one hundred eleven million, one hundred one thousand, two hundred eleven".