211111111022222 has 32 divisors (see below), whose sum is σ = 339466795076160. Its totient is φ = 98115011596800.

The previous prime is 211111111022191. The next prime is 211111111022321. The reversal of 211111111022222 is 222220111111112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 211111111022194 and 211111111022203.

It is a congruent number.

It is an unprimeable number.

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, 76063322 + ... + 78789917.

It is an arithmetic number, because the mean of its divisors is an integer number (10608337346130).

Almost surely, 2^{211111111022222} is an apocalyptic number.

211111111022222 is a deficient number, since it is larger than the sum of its proper divisors (128355684053938).

211111111022222 is a wasteful number, since it uses less digits than its factorization.

211111111022222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154853756.

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

Adding to 211111111022222 its reverse (222220111111112), we get a palindrome (433331222133334).

The spelling of 211111111022222 in words is "two hundred eleven trillion, one hundred eleven billion, one hundred eleven million, twenty-two thousand, two hundred twenty-two".