214420121 has 4 divisors (see below), whose sum is σ = 214702644. Its totient is φ = 214137600.

The previous prime is 214420109. The next prime is 214420123. The reversal of 214420121 is 121024412.

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 19678096 + 194742025 = 4436^2 + 13955^2 .

It is a cyclic number.

It is not a de Polignac number, because 214420121 - 2⁶ = 214420057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 214420121.

It is not an unprimeable number, because it can be changed into a prime (214420123) 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, 140120 + ... + 141641.

It is an arithmetic number, because the mean of its divisors is an integer number (53675661).

Almost surely, 2^214420121 is an apocalyptic number.

It is an amenable number.

214420121 is a deficient number, since it is larger than the sum of its proper divisors (282523).

214420121 is an equidigital number, since it uses as much as digits as its factorization.

214420121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282522.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 214420121 is about 14643.0912378500. The cubic root of 214420121 is about 598.5335679557.

Adding to 214420121 its reverse (121024412), we get a palindrome (335444533).

The spelling of 214420121 in words is "two hundred fourteen million, four hundred twenty thousand, one hundred twenty-one".