12111990949 has 2 divisors, whose sum is σ = 12111990950. Its totient is φ = 12111990948.

The previous prime is 12111990907. The next prime is 12111990977. The reversal of 12111990949 is 94909911121.

12111990949 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., 11886450625 + 225540324 = 109025^2 + 15018^2 .

It is a cyclic number.

It is not a de Polignac number, because 12111990949 - 2³³ = 3522056357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12111990899 and 12111990908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12111994949) 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, 6055995474 + 6055995475.

It is an arithmetic number, because the mean of its divisors is an integer number (6055995475).

Almost surely, 2^12111990949 is an apocalyptic number.

It is an amenable number.

12111990949 is a deficient number, since it is larger than the sum of its proper divisors (1).

12111990949 is an equidigital number, since it uses as much as digits as its factorization.

12111990949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52488, while the sum is 46.

The spelling of 12111990949 in words is "twelve billion, one hundred eleven million, nine hundred ninety thousand, nine hundred forty-nine".