212211122 has 4 divisors (see below), whose sum is σ = 318316686. Its totient is φ = 106105560.

The previous prime is 212211113. The next prime is 212211127. The reversal of 212211122 is 221112212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 201327721 + 10883401 = 14189^2 + 3299^2 .

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 = 212211097 and 212211106.

It is not an unprimeable number, because it can be changed into a prime (212211127) by changing a digit.

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 as a sum of consecutive naturals, namely, 53052779 + ... + 53052782.

Almost surely, 2^212211122 is an apocalyptic number.

212211122 is a deficient number, since it is larger than the sum of its proper divisors (106105564).

212211122 is a wasteful number, since it uses less digits than its factorization.

212211122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106105563.

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

The square root of 212211122 is about 14567.4679337214. The cubic root of 212211122 is about 596.4710646807.

Adding to 212211122 its reverse (221112212), we get a palindrome (433323334).

The spelling of 212211122 in words is "two hundred twelve million, two hundred eleven thousand, one hundred twenty-two".