12243021201421 has 4 divisors (see below), whose sum is σ = 12775326471072. Its totient is φ = 11710715931772.

The previous prime is 12243021201409. The next prime is 12243021201469. The reversal of 12243021201421 is 12410212034221.

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 12243021201421 - 2⁷ = 12243021201293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12243021201401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266152634791 + ... + 266152634836.

It is an arithmetic number, because the mean of its divisors is an integer number (3193831617768).

Almost surely, 2^{12243021201421} is an apocalyptic number.

It is an amenable number.

12243021201421 is a deficient number, since it is larger than the sum of its proper divisors (532305269651).

12243021201421 is an equidigital number, since it uses as much as digits as its factorization.

12243021201421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532305269650.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 12243021201421 its reverse (12410212034221), we get a palindrome (24653233235642).

The spelling of 12243021201421 in words is "twelve trillion, two hundred forty-three billion, twenty-one million, two hundred one thousand, four hundred twenty-one".