214004221 has 2 divisors, whose sum is σ = 214004222. Its totient is φ = 214004220.

The previous prime is 214004183. The next prime is 214004227. The reversal of 214004221 is 122400412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209960100 + 4044121 = 14490^2 + 2011^2 .

It is a cyclic number.

It is not a de Polignac number, because 214004221 - 2¹⁵ = 213971453 is a prime.

It is equal to p_11810230 and since 214004221 and 11810230 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 214004195 and 214004204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (214004227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107002110 + 107002111.

It is an arithmetic number, because the mean of its divisors is an integer number (107002111).

Almost surely, 2^214004221 is an apocalyptic number.

It is an amenable number.

214004221 is a deficient number, since it is larger than the sum of its proper divisors (1).

214004221 is an equidigital number, since it uses as much as digits as its factorization.

214004221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 214004221 is about 14628.8831084263. The cubic root of 214004221 is about 598.1463355928.

Adding to 214004221 its reverse (122400412), we get a palindrome (336404633).

The spelling of 214004221 in words is "two hundred fourteen million, four thousand, two hundred twenty-one".