12200111202121 has 2 divisors, whose sum is σ = 12200111202122. Its totient is φ = 12200111202120.

The previous prime is 12200111202073. The next prime is 12200111202131. The reversal of 12200111202121 is 12120211100221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11837453113600 + 362658088521 = 3440560^2 + 602211^2 .

It is a cyclic number.

It is not a de Polignac number, because 12200111202121 - 2¹¹ = 12200111200073 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12200111202095 and 12200111202104.

It is not a weakly prime, because it can be changed into another prime (12200111202131) 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, 6100055601060 + 6100055601061.

It is an arithmetic number, because the mean of its divisors is an integer number (6100055601061).

Almost surely, 2^{12200111202121} is an apocalyptic number.

It is an amenable number.

12200111202121 is a deficient number, since it is larger than the sum of its proper divisors (1).

12200111202121 is an equidigital number, since it uses as much as digits as its factorization.

12200111202121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 12200111202121 its reverse (12120211100221), we get a palindrome (24320322302342).

The spelling of 12200111202121 in words is "twelve trillion, two hundred billion, one hundred eleven million, two hundred two thousand, one hundred twenty-one".