211111222110222 has 32 divisors (see below), whose sum is σ = 482540778646272. Its totient is φ = 60317386732224.

The previous prime is 211111222110157. The next prime is 211111222110247. The reversal of 211111222110222 is 222011222111112.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21795633 + ... + 29954499.

It is an arithmetic number, because the mean of its divisors is an integer number (15079399332696).

Almost surely, 2^{211111222110222} is an apocalyptic number.

211111222110222 is an abundant number, since it is smaller than the sum of its proper divisors (271429556536050).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211111222110222 is a wasteful number, since it uses less digits than its factorization.

211111222110222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8774952.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 211111222110222 its reverse (222011222111112), we get a palindrome (433122444221334).

The spelling of 211111222110222 in words is "two hundred eleven trillion, one hundred eleven billion, two hundred twenty-two million, one hundred ten thousand, two hundred twenty-two".