12620565224221 has 16 divisors (see below), whose sum is σ = 13420905292800. Its totient is φ = 11834034184368.

The previous prime is 12620565224209. The next prime is 12620565224261. The reversal of 12620565224221 is 12242256502621.

It is a cyclic number.

It is not a de Polignac number, because 12620565224221 - 2¹⁹ = 12620564699933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12620565224261) 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, 480901 + ... + 5047018.

It is an arithmetic number, because the mean of its divisors is an integer number (838806580800).

Almost surely, 2^{12620565224221} is an apocalyptic number.

It is an amenable number.

12620565224221 is a deficient number, since it is larger than the sum of its proper divisors (800340068579).

12620565224221 is a wasteful number, since it uses less digits than its factorization.

12620565224221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5529168.

The product of its (nonzero) digits is 230400, while the sum is 40.

The spelling of 12620565224221 in words is "twelve trillion, six hundred twenty billion, five hundred sixty-five million, two hundred twenty-four thousand, two hundred twenty-one".