12219785289 has 24 divisors (see below), whose sum is σ = 18047719872. Its totient is φ = 7964932320.

The previous prime is 12219785261. The next prime is 12219785293. The reversal of 12219785289 is 98258791221.

12219785289 is a `hidden beast` number, since 1 + 2 + 21 + 97 + 8 + 528 + 9 = 666.

It is not a de Polignac number, because 12219785289 - 2¹¹ = 12219783241 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12219785219) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25042 + ... + 158324.

It is an arithmetic number, because the mean of its divisors is an integer number (751988328).

Almost surely, 2^12219785289 is an apocalyptic number.

It is an amenable number.

12219785289 is a deficient number, since it is larger than the sum of its proper divisors (5827934583).

12219785289 is a wasteful number, since it uses less digits than its factorization.

12219785289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133517 (or 133514 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 54.

The spelling of 12219785289 in words is "twelve billion, two hundred nineteen million, seven hundred eighty-five thousand, two hundred eighty-nine".