214201021 has 4 divisors (see below), whose sum is σ = 214877052. Its totient is φ = 213524992.

The previous prime is 214200997. The next prime is 214201027. The reversal of 214201021 is 120102412.

It is a happy number.

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 17892900 + 196308121 = 4230^2 + 14011^2 .

It is a cyclic number.

It is not a de Polignac number, because 214201021 - 2²⁵ = 180646589 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 214200992 and 214201010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (214201027) 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, 337540 + ... + 338173.

It is an arithmetic number, because the mean of its divisors is an integer number (53719263).

Almost surely, 2^214201021 is an apocalyptic number.

It is an amenable number.

214201021 is a deficient number, since it is larger than the sum of its proper divisors (676031).

214201021 is an equidigital number, since it uses as much as digits as its factorization.

214201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676030.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 214201021 is about 14635.6079819050. The cubic root of 214201021 is about 598.3296328081.

Adding to 214201021 its reverse (120102412), we get a palindrome (334303433).

The spelling of 214201021 in words is "two hundred fourteen million, two hundred one thousand, twenty-one".