12420342221144 has 64 divisors (see below), whose sum is σ = 27468497710080. Its totient is φ = 5190570000000.

The previous prime is 12420342221101. The next prime is 12420342221227. The reversal of 12420342221144 is 44112224302421.

It is a self number, because there is not a number n which added to its sum of digits gives 12420342221144.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21340232 + ... + 21914519.

It is an arithmetic number, because the mean of its divisors is an integer number (429195276720).

Almost surely, 2^{12420342221144} is an apocalyptic number.

It is an amenable number.

12420342221144 is an abundant number, since it is smaller than the sum of its proper divisors (15048155488936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12420342221144 is a wasteful number, since it uses less digits than its factorization.

12420342221144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43255032 (or 43255028 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 32.

Adding to 12420342221144 its reverse (44112224302421), we get a palindrome (56532566523565).

The spelling of 12420342221144 in words is "twelve trillion, four hundred twenty billion, three hundred forty-two million, two hundred twenty-one thousand, one hundred forty-four".