12344344405221 has 16 divisors (see below), whose sum is σ = 16811652492288. Its totient is φ = 8053348220400.

The previous prime is 12344344405207. The next prime is 12344344405259. The reversal of 12344344405221 is 12250444344321.

It is not a de Polignac number, because 12344344405221 - 2²⁹ = 12343807534309 is a prime.

It is a super-2 number, since 2×12344344405221² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12344344405221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12344344405121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5053735 + ... + 7087236.

It is an arithmetic number, because the mean of its divisors is an integer number (1050728280768).

Almost surely, 2^{12344344405221} is an apocalyptic number.

It is an amenable number.

12344344405221 is a deficient number, since it is larger than the sum of its proper divisors (4467308087067).

12344344405221 is a wasteful number, since it uses less digits than its factorization.

12344344405221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12148232.

The product of its (nonzero) digits is 368640, while the sum is 39.

Adding to 12344344405221 its reverse (12250444344321), we get a palindrome (24594788749542).

The spelling of 12344344405221 in words is "twelve trillion, three hundred forty-four billion, three hundred forty-four million, four hundred five thousand, two hundred twenty-one".