12445344354421 has 4 divisors (see below), whose sum is σ = 13576739295744. Its totient is φ = 11313949413100.

The previous prime is 12445344354409. The next prime is 12445344354431.

12445344354421 is nontrivially palindromic in base 10.

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 12445344354421 - 2⁵ = 12445344354389 is a prime.

It is a super-2 number, since 2×12445344354421² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12445344354431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 565697470645 + ... + 565697470666.

It is an arithmetic number, because the mean of its divisors is an integer number (3394184823936).

Almost surely, 2^{12445344354421} is an apocalyptic number.

12445344354421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12445344354421 is a deficient number, since it is larger than the sum of its proper divisors (1131394941323).

12445344354421 is a wasteful number, since it uses less digits than its factorization.

12445344354421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1131394941322.

The product of its digits is 3686400, while the sum is 46.

It can be divided in two parts, 1244534 and 4354421, that added together give a palindrome (5598955).

The spelling of 12445344354421 in words is "twelve trillion, four hundred forty-five billion, three hundred forty-four million, three hundred fifty-four thousand, four hundred twenty-one".