214404243221 has 4 divisors (see below), whose sum is σ = 245033420832. Its totient is φ = 183775065612.

The previous prime is 214404243217. The next prime is 214404243227. The reversal of 214404243221 is 122342404412.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 214404243221 - 2² = 214404243217 is a prime.

It is a super-2 number, since 2×214404243221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (214404243227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15314588795 + ... + 15314588808.

It is an arithmetic number, because the mean of its divisors is an integer number (61258355208).

Almost surely, 2^214404243221 is an apocalyptic number.

It is an amenable number.

214404243221 is a deficient number, since it is larger than the sum of its proper divisors (30629177611).

214404243221 is an equidigital number, since it uses as much as digits as its factorization.

214404243221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30629177610.

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 214404243221 its reverse (122342404412), we get a palindrome (336746647633).

The spelling of 214404243221 in words is "two hundred fourteen billion, four hundred four million, two hundred forty-three thousand, two hundred twenty-one".