165546121222122 has 8 divisors (see below), whose sum is σ = 331092242444256. Its totient is φ = 55182040407372.

The previous prime is 165546121222117. The next prime is 165546121222129. The reversal of 165546121222122 is 221222121645561.

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

165546121222122 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (165546121222129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13795510101838 + ... + 13795510101849.

It is an arithmetic number, because the mean of its divisors is an integer number (41386530305532).

Almost surely, 2^{165546121222122} is an apocalyptic number.

165546121222122 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

165546121222122 is a wasteful number, since it uses less digits than its factorization.

165546121222122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27591020203692.

The product of its digits is 230400, while the sum is 42.

Adding to 165546121222122 its reverse (221222121645561), we get a palindrome (386768242867683).

The spelling of 165546121222122 in words is "one hundred sixty-five trillion, five hundred forty-six billion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred twenty-two".