214221121 has 4 divisors (see below), whose sum is σ = 214716292. Its totient is φ = 213725952.

The previous prime is 214221113. The next prime is 214221167. The reversal of 214221121 is 121122412.

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

It can be written as a sum of positive squares in 2 ways, for example, as 89586225 + 124634896 = 9465^2 + 11164^2 .

It is a cyclic number.

It is not a de Polignac number, because 214221121 - 2³ = 214221113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 214221095 and 214221104.

It is not an unprimeable number, because it can be changed into a prime (214227121) 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, 246936 + ... + 247801.

It is an arithmetic number, because the mean of its divisors is an integer number (53679073).

Almost surely, 2^214221121 is an apocalyptic number.

It is an amenable number.

214221121 is a deficient number, since it is larger than the sum of its proper divisors (495171).

214221121 is an equidigital number, since it uses as much as digits as its factorization.

214221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495170.

The product of its digits is 64, while the sum is 16.

The square root of 214221121 is about 14636.2946472118. The cubic root of 214221121 is about 598.3483473928.

Adding to 214221121 its reverse (121122412), we get a palindrome (335343533).

The spelling of 214221121 in words is "two hundred fourteen million, two hundred twenty-one thousand, one hundred twenty-one".