212125222 has 4 divisors (see below), whose sum is σ = 318187836. Its totient is φ = 106062610.

The previous prime is 212125213. The next prime is 212125223. The reversal of 212125222 is 222521212.

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

It is a self number, because there is not a number n which added to its sum of digits gives 212125222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212125223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53031304 + ... + 53031307.

It is an arithmetic number, because the mean of its divisors is an integer number (79546959).

Almost surely, 2^212125222 is an apocalyptic number.

212125222 is a deficient number, since it is larger than the sum of its proper divisors (106062614).

212125222 is a wasteful number, since it uses less digits than its factorization.

212125222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106062613.

The product of its digits is 320, while the sum is 19.

The square root of 212125222 is about 14564.5192848923. The cubic root of 212125222 is about 596.3905728590.

Adding to 212125222 its reverse (222521212), we get a palindrome (434646434).

The spelling of 212125222 in words is "two hundred twelve million, one hundred twenty-five thousand, two hundred twenty-two".