12111051409 has 2 divisors, whose sum is σ = 12111051410. Its totient is φ = 12111051408.

The previous prime is 12111051391. The next prime is 12111051431. The reversal of 12111051409 is 90415011121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9950661009 + 2160390400 = 99753^2 + 46480^2 .

It is a cyclic number.

It is not a de Polignac number, because 12111051409 - 2¹¹ = 12111049361 is a prime.

It is not a weakly prime, because it can be changed into another prime (12111051439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6055525704 + 6055525705.

It is an arithmetic number, because the mean of its divisors is an integer number (6055525705).

Almost surely, 2^12111051409 is an apocalyptic number.

It is an amenable number.

12111051409 is a deficient number, since it is larger than the sum of its proper divisors (1).

12111051409 is an equidigital number, since it uses as much as digits as its factorization.

12111051409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 25.

The spelling of 12111051409 in words is "twelve billion, one hundred eleven million, fifty-one thousand, four hundred nine".