214231221 has 24 divisors (see below), whose sum is σ = 318689280. Its totient is φ = 138576096.

The previous prime is 214231219. The next prime is 214231267. The reversal of 214231221 is 122132412.

It is a happy number.

214231221 is a `hidden beast` number, since 21 + 423 + 1 + 221 = 666.

214231221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 214231221 - 2¹ = 214231219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 214231194 and 214231203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (214231271) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 166860 + ... + 168138.

It is an arithmetic number, because the mean of its divisors is an integer number (13278720).

Almost surely, 2^214231221 is an apocalyptic number.

It is an amenable number.

214231221 is a deficient number, since it is larger than the sum of its proper divisors (104458059).

214231221 is a wasteful number, since it uses less digits than its factorization.

214231221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1825 (or 1822 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 214231221 is about 14636.6396758272. The cubic root of 214231221 is about 598.3577507970.

Adding to 214231221 its reverse (122132412), we get a palindrome (336363633).

The spelling of 214231221 in words is "two hundred fourteen million, two hundred thirty-one thousand, two hundred twenty-one".