214122221 has 4 divisors (see below), whose sum is σ = 214585152. Its totient is φ = 213659292.

The previous prime is 214122217. The next prime is 214122247. The reversal of 214122221 is 122221412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 214122221 - 2² = 214122217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 214122221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (214122421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230771 + ... + 231696.

It is an arithmetic number, because the mean of its divisors is an integer number (53646288).

Almost surely, 2^214122221 is an apocalyptic number.

It is an amenable number.

214122221 is a deficient number, since it is larger than the sum of its proper divisors (462931).

214122221 is an equidigital number, since it uses as much as digits as its factorization.

214122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462930.

The product of its digits is 128, while the sum is 17.

The square root of 214122221 is about 14632.9156698178. The cubic root of 214122221 is about 598.2562528935.

Adding to 214122221 its reverse (122221412), we get a palindrome (336343633).

The spelling of 214122221 in words is "two hundred fourteen million, one hundred twenty-two thousand, two hundred twenty-one".