12445444454421 has 128 divisors (see below), whose sum is σ = 20267860746240. Its totient is φ = 6710546304000.

The previous prime is 12445444454321. The next prime is 12445444454449.

It is a happy number.

12445444454421 is nontrivially palindromic in base 10.

12445444454421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12445444454421 - 2⁷ = 12445444454293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12445444454491) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 82179456 + ... + 82330758.

It is an arithmetic number, because the mean of its divisors is an integer number (158342662080).

Almost surely, 2^{12445444454421} is an apocalyptic number.

12445444454421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12445444454421 is a deficient number, since it is larger than the sum of its proper divisors (7822416291819).

12445444454421 is a wasteful number, since it uses less digits than its factorization.

12445444454421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151507.

The product of its digits is 6553600, while the sum is 48.

It can be divided in two parts, 1244544 and 4454421, that added together give a palindrome (5698965).

The spelling of 12445444454421 in words is "twelve trillion, four hundred forty-five billion, four hundred forty-four million, four hundred fifty-four thousand, four hundred twenty-one".