211121222 has 24 divisors (see below), whose sum is σ = 353995200. Its totient is φ = 94292640.

The previous prime is 211121213. The next prime is 211121237. The reversal of 211121222 is 222121112.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 211121197 and 211121206.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 404 + ... + 20552.

It is an arithmetic number, because the mean of its divisors is an integer number (14749800).

Almost surely, 2^211121222 is an apocalyptic number.

211121222 is a deficient number, since it is larger than the sum of its proper divisors (142873978).

211121222 is a wasteful number, since it uses less digits than its factorization.

211121222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20208 (or 20195 counting only the distinct ones).

The product of its digits is 32, while the sum is 14.

The square root of 211121222 is about 14530.0110805188. The cubic root of 211121222 is about 595.4481683347.

Adding to 211121222 its reverse (222121112), we get a palindrome (433242334).

The spelling of 211121222 in words is "two hundred eleven million, one hundred twenty-one thousand, two hundred twenty-two".