12003551611 has 2 divisors, whose sum is σ = 12003551612. Its totient is φ = 12003551610.

The previous prime is 12003551563. The next prime is 12003551647. The reversal of 12003551611 is 11615530021.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12003551611 - 2³³ = 3413617019 is a prime.

It is not a weakly prime, because it can be changed into another prime (12003551311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6001775805 + 6001775806.

It is an arithmetic number, because the mean of its divisors is an integer number (6001775806).

Almost surely, 2^12003551611 is an apocalyptic number.

12003551611 is a deficient number, since it is larger than the sum of its proper divisors (1).

12003551611 is an equidigital number, since it uses as much as digits as its factorization.

12003551611 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 900, while the sum is 25.

The spelling of 12003551611 in words is "twelve billion, three million, five hundred fifty-one thousand, six hundred eleven".