121122664161 has 16 divisors (see below), whose sum is σ = 165729775680. Its totient is φ = 78638996480.

The previous prime is 121122664151. The next prime is 121122664177. The reversal of 121122664161 is 161466221121.

It is a cyclic number.

It is not a de Polignac number, because 121122664161 - 2¹⁴ = 121122647777 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121122664111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 805296 + ... + 943793.

It is an arithmetic number, because the mean of its divisors is an integer number (10358110980).

Almost surely, 2^121122664161 is an apocalyptic number.

It is an amenable number.

121122664161 is a deficient number, since it is larger than the sum of its proper divisors (44607111519).

121122664161 is a wasteful number, since it uses less digits than its factorization.

121122664161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1749696.

The product of its digits is 6912, while the sum is 33.

Adding to 121122664161 its reverse (161466221121), we get a palindrome (282588885282).

The spelling of 121122664161 in words is "one hundred twenty-one billion, one hundred twenty-two million, six hundred sixty-four thousand, one hundred sixty-one".