214122421 has 2 divisors, whose sum is σ = 214122422. Its totient is φ = 214122420.

The previous prime is 214122401. The next prime is 214122427. The reversal of 214122421 is 124221412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 197402500 + 16719921 = 14050^2 + 4089^2 .

It is a cyclic number.

It is not a de Polignac number, because 214122421 - 2⁹ = 214121909 is a prime.

It is a super-2 number, since 2×214122421² = 91696822349802482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (214122427) 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 as a sum of consecutive naturals, namely, 107061210 + 107061211.

It is an arithmetic number, because the mean of its divisors is an integer number (107061211).

Almost surely, 2^214122421 is an apocalyptic number.

It is an amenable number.

214122421 is a deficient number, since it is larger than the sum of its proper divisors (1).

214122421 is an equidigital number, since it uses as much as digits as its factorization.

214122421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 256, while the sum is 19.

The square root of 214122421 is about 14632.9225037243. The cubic root of 214122421 is about 598.2564391597.

Adding to 214122421 its reverse (124221412), we get a palindrome (338343833).

The spelling of 214122421 in words is "two hundred fourteen million, one hundred twenty-two thousand, four hundred twenty-one".