12121022021177 has 2 divisors, whose sum is σ = 12121022021178. Its totient is φ = 12121022021176.

The previous prime is 12121022021111. The next prime is 12121022021219. The reversal of 12121022021177 is 77112022012121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11888559184441 + 232462836736 = 3447979^2 + 482144^2 .

It is an emirp because it is prime and its reverse (77112022012121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12121022021177 - 2³⁰ = 12119948279353 is a prime.

It is not a weakly prime, because it can be changed into another prime (12121022021677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060511010588 + 6060511010589.

It is an arithmetic number, because the mean of its divisors is an integer number (6060511010589).

Almost surely, 2^{12121022021177} is an apocalyptic number.

It is an amenable number.

12121022021177 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121022021177 is an equidigital number, since it uses as much as digits as its factorization.

12121022021177 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1568, while the sum is 29.

Adding to 12121022021177 its reverse (77112022012121), we get a palindrome (89233044033298).

The spelling of 12121022021177 in words is "twelve trillion, one hundred twenty-one billion, twenty-two million, twenty-one thousand, one hundred seventy-seven".