14204211221 has 4 divisors (see below), whose sum is σ = 14204680812. Its totient is φ = 14203741632.

The previous prime is 14204211193. The next prime is 14204211247. The reversal of 14204211221 is 12211240241.

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 9334264996 + 4869946225 = 96614^2 + 69785^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14204211221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 14204211193 and 14204211202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14204211271) 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, 186050 + ... + 251043.

It is an arithmetic number, because the mean of its divisors is an integer number (3551170203).

Almost surely, 2^14204211221 is an apocalyptic number.

It is an amenable number.

14204211221 is a deficient number, since it is larger than the sum of its proper divisors (469591).

14204211221 is an equidigital number, since it uses as much as digits as its factorization.

14204211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469590.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 14204211221 its reverse (12211240241), we get a palindrome (26415451462).

The spelling of 14204211221 in words is "fourteen billion, two hundred four million, two hundred eleven thousand, two hundred twenty-one".