12021660011 has 2 divisors, whose sum is σ = 12021660012. Its totient is φ = 12021660010.

The previous prime is 12021659977. The next prime is 12021660043. The reversal of 12021660011 is 11006612021.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12021660011 is a prime.

It is not a weakly prime, because it can be changed into another prime (12021665011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010830005 + 6010830006.

It is an arithmetic number, because the mean of its divisors is an integer number (6010830006).

Almost surely, 2^12021660011 is an apocalyptic number.

12021660011 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021660011 is an equidigital number, since it uses as much as digits as its factorization.

12021660011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 12021660011 in words is "twelve billion, twenty-one million, six hundred sixty thousand, eleven".