121123211161 has 2 divisors, whose sum is σ = 121123211162. Its totient is φ = 121123211160.

The previous prime is 121123211159. The next prime is 121123211213. The reversal of 121123211161 is 161112321121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84285702400 + 36837508761 = 290320^2 + 191931^2 .

It is a cyclic number.

It is not a de Polignac number, because 121123211161 - 2¹ = 121123211159 is a prime.

Together with 121123211159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (121123511161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60561605580 + 60561605581.

It is an arithmetic number, because the mean of its divisors is an integer number (60561605581).

Almost surely, 2^121123211161 is an apocalyptic number.

It is an amenable number.

121123211161 is a deficient number, since it is larger than the sum of its proper divisors (1).

121123211161 is an equidigital number, since it uses as much as digits as its factorization.

121123211161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144, while the sum is 22.

Adding to 121123211161 its reverse (161112321121), we get a palindrome (282235532282).

The spelling of 121123211161 in words is "one hundred twenty-one billion, one hundred twenty-three million, two hundred eleven thousand, one hundred sixty-one".