12447844874421 has 32 divisors (see below), whose sum is σ = 18226592870400. Its totient is φ = 7493887128000.

The previous prime is 12447844874371. The next prime is 12447844874501.

12447844874421 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 12447844874421 - 2¹⁴ = 12447844858037 is a prime.

It is a super-2 number, since 2×12447844874421² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12447844870421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 241216180 + ... + 241267778.

It is an arithmetic number, because the mean of its divisors is an integer number (569581027200).

Almost surely, 2^{12447844874421} is an apocalyptic number.

12447844874421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12447844874421 is a deficient number, since it is larger than the sum of its proper divisors (5778747995979).

12447844874421 is a wasteful number, since it uses less digits than its factorization.

12447844874421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100177.

The product of its digits is 51380224, while the sum is 60.

The spelling of 12447844874421 in words is "twelve trillion, four hundred forty-seven billion, eight hundred forty-four million, eight hundred seventy-four thousand, four hundred twenty-one".