12220978949 has 2 divisors, whose sum is σ = 12220978950. Its totient is φ = 12220978948.

The previous prime is 12220978919. The next prime is 12220978969. The reversal of 12220978949 is 94987902221.

12220978949 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7839862849 + 4381116100 = 88543^2 + 66190^2 .

It is an emirp because it is prime and its reverse (94987902221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12220978949 is a prime.

It is a super-2 number, since 2×12220978949² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12220978949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12220978919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110489474 + 6110489475.

It is an arithmetic number, because the mean of its divisors is an integer number (6110489475).

Almost surely, 2^12220978949 is an apocalyptic number.

It is an amenable number.

12220978949 is a deficient number, since it is larger than the sum of its proper divisors (1).

12220978949 is an equidigital number, since it uses as much as digits as its factorization.

12220978949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1306368, while the sum is 53.

The spelling of 12220978949 in words is "twelve billion, two hundred twenty million, nine hundred seventy-eight thousand, nine hundred forty-nine".