212221234 has 8 divisors (see below), whose sum is σ = 337057308. Its totient is φ = 99868800.

The previous prime is 212221223. The next prime is 212221237. The reversal of 212221234 is 432122212.

212221234 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 194184225 + 18037009 = 13935^2 + 4247^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (212221237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3120867 + ... + 3120934.

Almost surely, 2^212221234 is an apocalyptic number.

212221234 is a deficient number, since it is larger than the sum of its proper divisors (124836074).

212221234 is a wasteful number, since it uses less digits than its factorization.

212221234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6241820.

The product of its digits is 384, while the sum is 19.

The square root of 212221234 is about 14567.8150043169. The cubic root of 212221234 is about 596.4805386101.

Adding to 212221234 its reverse (432122212), we get a palindrome (644343446).

The spelling of 212221234 in words is "two hundred twelve million, two hundred twenty-one thousand, two hundred thirty-four".