212011222 has 4 divisors (see below), whose sum is σ = 318016836. Its totient is φ = 106005610.

The previous prime is 212011207. The next prime is 212011223. The reversal of 212011222 is 222110212.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212011223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53002804 + ... + 53002807.

It is an arithmetic number, because the mean of its divisors is an integer number (79504209).

Almost surely, 2^212011222 is an apocalyptic number.

212011222 is a deficient number, since it is larger than the sum of its proper divisors (106005614).

212011222 is a wasteful number, since it uses less digits than its factorization.

212011222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106005613.

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

The square root of 212011222 is about 14560.6051385236. The cubic root of 212011222 is about 596.2837166230.

Adding to 212011222 its reverse (222110212), we get a palindrome (434121434).

The spelling of 212011222 in words is "two hundred twelve million, eleven thousand, two hundred twenty-two".