12421443562045 has 24 divisors (see below), whose sum is σ = 17708242961664. Its totient is φ = 8336336583456.

The previous prime is 12421443561997. The next prime is 12421443562061. The reversal of 12421443562045 is 54026534412421.

It is a de Polignac number, because none of the positive numbers 2^k-12421443562045 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12421443561992 and 12421443562010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 539347737 + ... + 539370766.

It is an arithmetic number, because the mean of its divisors is an integer number (737843456736).

Almost surely, 2^{12421443562045} is an apocalyptic number.

It is an amenable number.

12421443562045 is a deficient number, since it is larger than the sum of its proper divisors (5286799399619).

12421443562045 is a wasteful number, since it uses less digits than its factorization.

12421443562045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078718569 (or 1078718562 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 43.

Adding to 12421443562045 its reverse (54026534412421), we get a palindrome (66447977974466).

The spelling of 12421443562045 in words is "twelve trillion, four hundred twenty-one billion, four hundred forty-three million, five hundred sixty-two thousand, forty-five".