212210122 has 4 divisors (see below), whose sum is σ = 318315186. Its totient is φ = 106105060.

The previous prime is 212210111. The next prime is 212210129. The reversal of 212210122 is 221012212.

It is a happy number.

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., 155975121 + 56235001 = 12489^2 + 7499^2 .

It is not an unprimeable number, because it can be changed into a prime (212210129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53052529 + ... + 53052532.

Almost surely, 2^212210122 is an apocalyptic number.

212210122 is a deficient number, since it is larger than the sum of its proper divisors (106105064).

212210122 is a wasteful number, since it uses less digits than its factorization.

212210122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106105063.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 212210122 is about 14567.4336106261. The cubic root of 212210122 is about 596.4701277646.

Adding to 212210122 its reverse (221012212), we get a palindrome (433222334).

The spelling of 212210122 in words is "two hundred twelve million, two hundred ten thousand, one hundred twenty-two".