211222011221111 has 16 divisors (see below), whose sum is σ = 230488099890048. Its totient is φ = 191966611274400.

The previous prime is 211222011221069. The next prime is 211222011221213. The reversal of 211222011221111 is 111122110222112.

It is a happy number.

211222011221111 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 211222011221111 - 2³⁸ = 210947133314167 is a prime.

It is a super-2 number, since 2×211222011221111² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211222011421111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 590508260 + ... + 590865846.

It is an arithmetic number, because the mean of its divisors is an integer number (14405506243128).

Almost surely, 2^{211222011221111} is an apocalyptic number.

211222011221111 is a deficient number, since it is larger than the sum of its proper divisors (19266088668937).

211222011221111 is a wasteful number, since it uses less digits than its factorization.

211222011221111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372382.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 211222011221111 its reverse (111122110222112), we get a palindrome (322344121443223).

It can be divided in two parts, 2112220 and 11221111, that added together give a palindrome (13333331).

The spelling of 211222011221111 in words is "two hundred eleven trillion, two hundred twenty-two billion, eleven million, two hundred twenty-one thousand, one hundred eleven".