165121122 has 16 divisors (see below), whose sum is σ = 330448320. Its totient is φ = 55006032.

The previous prime is 165121111. The next prime is 165121123. The reversal of 165121122 is 221121561.

165121122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (165121123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3043 + ... + 18425.

It is an arithmetic number, because the mean of its divisors is an integer number (20653020).

Almost surely, 2^165121122 is an apocalyptic number.

165121122 is an abundant number, since it is smaller than the sum of its proper divisors (165327198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165121122 is a wasteful number, since it uses less digits than its factorization.

165121122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17177.

The product of its digits is 240, while the sum is 21.

The square root of 165121122 is about 12849.9463812111. The cubic root of 165121122 is about 548.6148306473.

Adding to 165121122 its reverse (221121561), we get a palindrome (386242683).

The spelling of 165121122 in words is "one hundred sixty-five million, one hundred twenty-one thousand, one hundred twenty-two".