12120122121161 has 2 divisors, whose sum is σ = 12120122121162. Its totient is φ = 12120122121160.

The previous prime is 12120122121091. The next prime is 12120122121167. The reversal of 12120122121161 is 16112122102121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11893980025225 + 226142095936 = 3448765^2 + 475544^2 .

It is a cyclic number.

It is not a de Polignac number, because 12120122121161 - 2¹⁰ = 12120122120137 is a prime.

It is not a weakly prime, because it can be changed into another prime (12120122121167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060061060580 + 6060061060581.

It is an arithmetic number, because the mean of its divisors is an integer number (6060061060581).

Almost surely, 2^{12120122121161} is an apocalyptic number.

It is an amenable number.

12120122121161 is a deficient number, since it is larger than the sum of its proper divisors (1).

12120122121161 is an equidigital number, since it uses as much as digits as its factorization.

12120122121161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 23.

Adding to 12120122121161 its reverse (16112122102121), we get a palindrome (28232244223282).

The spelling of 12120122121161 in words is "twelve trillion, one hundred twenty billion, one hundred twenty-two million, one hundred twenty-one thousand, one hundred sixty-one".