212111222011 has 16 divisors (see below), whose sum is σ = 229330460800. Its totient is φ = 195022297728.

The previous prime is 212111221997. The next prime is 212111222023. The reversal of 212111222011 is 110222111212.

212111222011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 212111222011 - 2⁵ = 212111221979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212111222041) 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 15 ways as a sum of consecutive naturals, for example, 3928345 + ... + 3981973.

It is an arithmetic number, because the mean of its divisors is an integer number (14333153800).

Almost surely, 2^212111222011 is an apocalyptic number.

212111222011 is a deficient number, since it is larger than the sum of its proper divisors (17219238789).

212111222011 is a wasteful number, since it uses less digits than its factorization.

212111222011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54838.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 212111222011 its reverse (110222111212), we get a palindrome (322333333223).

The spelling of 212111222011 in words is "two hundred twelve billion, one hundred eleven million, two hundred twenty-two thousand, eleven".