12188588021 has 2 divisors, whose sum is σ = 12188588022. Its totient is φ = 12188588020.

The previous prime is 12188588017. The next prime is 12188588119. The reversal of 12188588021 is 12088588121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11006947396 + 1181640625 = 104914^2 + 34375^2 .

It is an emirp because it is prime and its reverse (12088588121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12188588021 - 2² = 12188588017 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12188588011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6094294010 + 6094294011.

It is an arithmetic number, because the mean of its divisors is an integer number (6094294011).

Almost surely, 2^12188588021 is an apocalyptic number.

It is an amenable number.

12188588021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12188588021 is an equidigital number, since it uses as much as digits as its factorization.

12188588021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81920, while the sum is 44.

The spelling of 12188588021 in words is "twelve billion, one hundred eighty-eight million, five hundred eighty-eight thousand, twenty-one".