12121210177 has 2 divisors, whose sum is σ = 12121210178. Its totient is φ = 12121210176.

The previous prime is 12121210139. The next prime is 12121210207. The reversal of 12121210177 is 77101212121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8876654656 + 3244555521 = 94216^2 + 56961^2 .

It is a cyclic number.

It is not a de Polignac number, because 12121210177 - 2²³ = 12112821569 is a prime.

It is not a weakly prime, because it can be changed into another prime (12121219177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060605088 + 6060605089.

It is an arithmetic number, because the mean of its divisors is an integer number (6060605089).

Almost surely, 2^12121210177 is an apocalyptic number.

It is an amenable number.

12121210177 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121210177 is an equidigital number, since it uses as much as digits as its factorization.

12121210177 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 392, while the sum is 25.

Adding to 12121210177 its reverse (77101212121), we get a palindrome (89222422298).

The spelling of 12121210177 in words is "twelve billion, one hundred twenty-one million, two hundred ten thousand, one hundred seventy-seven".