14243121141421 has 4 divisors (see below), whose sum is σ = 14702576662144. Its totient is φ = 13783665620700.

The previous prime is 14243121141407. The next prime is 14243121141433. The reversal of 14243121141421 is 12414112134241.

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 14243121141421 - 2⁹ = 14243121140909 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 459455520691 = 14243121141421 / (1 + 4 + 2 + 4 + 3 + 1 + 2 + 1 + 1 + 4 + 1 + 4 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14243121141461) 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, 229727760315 + ... + 229727760376.

It is an arithmetic number, because the mean of its divisors is an integer number (3675644165536).

Almost surely, 2^{14243121141421} is an apocalyptic number.

It is an amenable number.

14243121141421 is a deficient number, since it is larger than the sum of its proper divisors (459455520723).

14243121141421 is an equidigital number, since it uses as much as digits as its factorization.

14243121141421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459455520722.

The product of its digits is 6144, while the sum is 31.

Adding to 14243121141421 its reverse (12414112134241), we get a palindrome (26657233275662).

The spelling of 14243121141421 in words is "fourteen trillion, two hundred forty-three billion, one hundred twenty-one million, one hundred forty-one thousand, four hundred twenty-one".