121123161 has 16 divisors (see below), whose sum is σ = 179997120. Its totient is φ = 80498880.

The previous prime is 121123127. The next prime is 121123187. The reversal of 121123161 is 161321121.

It is not a de Polignac number, because 121123161 - 2⁶ = 121123097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121133161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2161 + ... + 15713.

It is an arithmetic number, because the mean of its divisors is an integer number (11249820).

Almost surely, 2^121123161 is an apocalyptic number.

It is an amenable number.

121123161 is a deficient number, since it is larger than the sum of its proper divisors (58873959).

121123161 is a wasteful number, since it uses less digits than its factorization.

121123161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13893 (or 13887 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

The square root of 121123161 is about 11005.5968034451. The cubic root of 121123161 is about 494.7765014904.

Adding to 121123161 its reverse (161321121), we get a palindrome (282444282).

The spelling of 121123161 in words is "one hundred twenty-one million, one hundred twenty-three thousand, one hundred sixty-one".