212234221 has 8 divisors (see below), whose sum is σ = 213486624. Its totient is φ = 210986160.

The previous prime is 212234219. The next prime is 212234233. The reversal of 212234221 is 122432212.

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

It is a cyclic number.

It is not a de Polignac number, because 212234221 - 2¹ = 212234219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212234251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153891 + ... + 155263.

It is an arithmetic number, because the mean of its divisors is an integer number (26685828).

Almost surely, 2^212234221 is an apocalyptic number.

It is an amenable number.

212234221 is a deficient number, since it is larger than the sum of its proper divisors (1252403).

212234221 is a wasteful number, since it uses less digits than its factorization.

212234221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2171.

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

The square root of 212234221 is about 14568.2607403904. The cubic root of 212234221 is about 596.4927056847.

Adding to 212234221 its reverse (122432212), we get a palindrome (334666433).

The spelling of 212234221 in words is "two hundred twelve million, two hundred thirty-four thousand, two hundred twenty-one".