12043511989 has 2 divisors, whose sum is σ = 12043511990. Its totient is φ = 12043511988.

The previous prime is 12043511957. The next prime is 12043512029. The reversal of 12043511989 is 98911534021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6958395889 + 5085116100 = 83417^2 + 71310^2 .

It is a cyclic number.

It is not a de Polignac number, because 12043511989 - 2⁵ = 12043511957 is a prime.

It is a super-2 number, since 2×12043511989² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12043511489) 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, 6021755994 + 6021755995.

It is an arithmetic number, because the mean of its divisors is an integer number (6021755995).

Almost surely, 2^12043511989 is an apocalyptic number.

It is an amenable number.

12043511989 is a deficient number, since it is larger than the sum of its proper divisors (1).

12043511989 is an equidigital number, since it uses as much as digits as its factorization.

12043511989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 43.

The spelling of 12043511989 in words is "twelve billion, forty-three million, five hundred eleven thousand, nine hundred eighty-nine".