12011001221977 has 2 divisors, whose sum is σ = 12011001221978. Its totient is φ = 12011001221976.

The previous prime is 12011001221957. The next prime is 12011001222019. The reversal of 12011001221977 is 77912210011021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9666807504201 + 2344193717776 = 3109149^2 + 1531076^2 .

It is a cyclic number.

It is not a de Polignac number, because 12011001221977 - 2¹¹ = 12011001219929 is a prime.

It is not a weakly prime, because it can be changed into another prime (12011001221957) 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, 6005500610988 + 6005500610989.

It is an arithmetic number, because the mean of its divisors is an integer number (6005500610989).

Almost surely, 2^{12011001221977} is an apocalyptic number.

It is an amenable number.

12011001221977 is a deficient number, since it is larger than the sum of its proper divisors (1).

12011001221977 is an equidigital number, since it uses as much as digits as its factorization.

12011001221977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528, while the sum is 34.

Adding to 12011001221977 its reverse (77912210011021), we get a palindrome (89923211232998).

The spelling of 12011001221977 in words is "twelve trillion, eleven billion, one million, two hundred twenty-one thousand, nine hundred seventy-seven".