165042213123 has 16 divisors (see below), whose sum is σ = 224402400000. Its totient is φ = 107872400160.

The previous prime is 165042213107. The next prime is 165042213151. The reversal of 165042213123 is 321312240561.

It is not a de Polignac number, because 165042213123 - 2⁴ = 165042213107 is a prime.

It is a super-2 number, since 2×165042213123² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (165042218123) 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, 2126248 + ... + 2202501.

It is an arithmetic number, because the mean of its divisors is an integer number (14025150000).

Almost surely, 2^165042213123 is an apocalyptic number.

165042213123 is a deficient number, since it is larger than the sum of its proper divisors (59360186877).

165042213123 is a wasteful number, since it uses less digits than its factorization.

165042213123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4329002.

The product of its (nonzero) digits is 8640, while the sum is 30.

Adding to 165042213123 its reverse (321312240561), we get a palindrome (486354453684).

The spelling of 165042213123 in words is "one hundred sixty-five billion, forty-two million, two hundred thirteen thousand, one hundred twenty-three".