12219784825 has 6 divisors (see below), whose sum is σ = 15152533214. Its totient is φ = 9775827840.

The previous prime is 12219784799. The next prime is 12219784877. The reversal of 12219784825 is 52848791221.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 48399849 + 12171384976 = 6957^2 + 110324^2 .

It is not a de Polignac number, because 12219784825 - 2¹¹ = 12219782777 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 244395672 + ... + 244395721.

Almost surely, 2^12219784825 is an apocalyptic number.

It is an amenable number.

12219784825 is a deficient number, since it is larger than the sum of its proper divisors (2932748389).

12219784825 is an equidigital number, since it uses as much as digits as its factorization.

12219784825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488791403 (or 488791398 counting only the distinct ones).

The product of its digits is 645120, while the sum is 49.

The spelling of 12219784825 in words is "twelve billion, two hundred nineteen million, seven hundred eighty-four thousand, eight hundred twenty-five".