214401021 has 8 divisors (see below), whose sum is σ = 287117280. Its totient is φ = 142309392.

The previous prime is 214401001. The next prime is 214401079. The reversal of 214401021 is 120104412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 214401021 - 2¹⁷ = 214269949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (214401001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155355 + ... + 156728.

It is an arithmetic number, because the mean of its divisors is an integer number (35889660).

Almost surely, 2^214401021 is an apocalyptic number.

It is an amenable number.

214401021 is a deficient number, since it is larger than the sum of its proper divisors (72716259).

214401021 is a wasteful number, since it uses less digits than its factorization.

214401021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312315.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 214401021 is about 14642.4390386301. The cubic root of 214401021 is about 598.5157954778.

Adding to 214401021 its reverse (120104412), we get a palindrome (334505433).

The spelling of 214401021 in words is "two hundred fourteen million, four hundred one thousand, twenty-one".