12111111149 has 2 divisors, whose sum is σ = 12111111150. Its totient is φ = 12111111148.

The previous prime is 12111111139. The next prime is 12111111193. The reversal of 12111111149 is 94111111121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9913189225 + 2197921924 = 99565^2 + 46882^2 .

It is a cyclic number.

It is not a de Polignac number, because 12111111149 - 2¹⁶ = 12111045613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12111111139) by changing a digit.

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 as a sum of consecutive naturals, namely, 6055555574 + 6055555575.

It is an arithmetic number, because the mean of its divisors is an integer number (6055555575).

Almost surely, 2^12111111149 is an apocalyptic number.

It is an amenable number.

12111111149 is a deficient number, since it is larger than the sum of its proper divisors (1).

12111111149 is an equidigital number, since it uses as much as digits as its factorization.

12111111149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72, while the sum is 23.

The spelling of 12111111149 in words is "twelve billion, one hundred eleven million, one hundred eleven thousand, one hundred forty-nine".