12011511443 has 2 divisors, whose sum is σ = 12011511444. Its totient is φ = 12011511442.

The previous prime is 12011511439. The next prime is 12011511461. The reversal of 12011511443 is 34411511021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12011511443 - 2² = 12011511439 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (12011510443) 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, 6005755721 + 6005755722.

It is an arithmetic number, because the mean of its divisors is an integer number (6005755722).

Almost surely, 2^12011511443 is an apocalyptic number.

12011511443 is a deficient number, since it is larger than the sum of its proper divisors (1).

12011511443 is an equidigital number, since it uses as much as digits as its factorization.

12011511443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 23.

The spelling of 12011511443 in words is "twelve billion, eleven million, five hundred eleven thousand, four hundred forty-three".