16214021 has 2 divisors, whose sum is σ = 16214022. Its totient is φ = 16214020.

The previous prime is 16214017. The next prime is 16214047. The reversal of 16214021 is 12041261.

16214021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15100996 + 1113025 = 3886^2 + 1055^2 .

It is an emirp because it is prime and its reverse (12041261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16214021 - 2² = 16214017 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16214071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8107010 + 8107011.

It is an arithmetic number, because the mean of its divisors is an integer number (8107011).

Almost surely, 2^16214021 is an apocalyptic number.

It is an amenable number.

16214021 is a deficient number, since it is larger than the sum of its proper divisors (1).

16214021 is an equidigital number, since it uses as much as digits as its factorization.

16214021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 16214021 is about 4026.6637555177. The cubic root of 16214021 is about 253.1027771173.

Adding to 16214021 its reverse (12041261), we get a palindrome (28255282).

The spelling of 16214021 in words is "sixteen million, two hundred fourteen thousand, twenty-one".