165120412321103 has 8 divisors (see below), whose sum is σ = 170125472056176. Its totient is φ = 160161911281600.

The previous prime is 165120412321061. The next prime is 165120412321127. The reversal of 165120412321103 is 301123214021561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 165120412321103 - 2¹⁰ = 165120412320079 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 165120412321103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165120412321133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11639666693 + ... + 11639680878.

It is an arithmetic number, because the mean of its divisors is an integer number (21265684007022).

Almost surely, 2^{165120412321103} is an apocalyptic number.

165120412321103 is a deficient number, since it is larger than the sum of its proper divisors (5005059735073).

165120412321103 is a wasteful number, since it uses less digits than its factorization.

165120412321103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23279347785.

The product of its (nonzero) digits is 8640, while the sum is 32.

Adding to 165120412321103 its reverse (301123214021561), we get a palindrome (466243626342664).

The spelling of 165120412321103 in words is "one hundred sixty-five trillion, one hundred twenty billion, four hundred twelve million, three hundred twenty-one thousand, one hundred three".