12021677 has 2 divisors, whose sum is σ = 12021678. Its totient is φ = 12021676.

The previous prime is 12021673. The next prime is 12021679. The reversal of 12021677 is 77612021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7295401 + 4726276 = 2701^2 + 2174^2 .

It is a cyclic number.

It is not a de Polignac number, because 12021677 - 2² = 12021673 is a prime.

Together with 12021679, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12021671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010838 + 6010839.

It is an arithmetic number, because the mean of its divisors is an integer number (6010839).

Almost surely, 2^12021677 is an apocalyptic number.

It is an amenable number.

12021677 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021677 is an equidigital number, since it uses as much as digits as its factorization.

12021677 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1176, while the sum is 26.

The square root of 12021677 is about 3467.2290088773. The cubic root of 12021677 is about 229.0806209782.

Adding to 12021677 its reverse (77612021), we get a palindrome (89633698).

The spelling of 12021677 in words is "twelve million, twenty-one thousand, six hundred seventy-seven".