12200121002171 has 2 divisors, whose sum is σ = 12200121002172. Its totient is φ = 12200121002170.

The previous prime is 12200121002117. The next prime is 12200121002233. The reversal of 12200121002171 is 17120012100221.

It is a happy number.

Together with previous prime (12200121002117) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12200121002171 - 2³⁰ = 12199047260347 is a prime.

It is a super-2 number, since 2×12200121002171² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12200121002071) 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, 6100060501085 + 6100060501086.

It is an arithmetic number, because the mean of its divisors is an integer number (6100060501086).

Almost surely, 2^{12200121002171} is an apocalyptic number.

12200121002171 is a deficient number, since it is larger than the sum of its proper divisors (1).

12200121002171 is an equidigital number, since it uses as much as digits as its factorization.

12200121002171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 20.

Adding to 12200121002171 its reverse (17120012100221), we get a palindrome (29320133102392).

The spelling of 12200121002171 in words is "twelve trillion, two hundred billion, one hundred twenty-one million, two thousand, one hundred seventy-one".