164044120012221 has 8 divisors (see below), whose sum is σ = 219680626509280. Its totient is φ = 108885180094992.

The previous prime is 164044120012169. The next prime is 164044120012237. The reversal of 164044120012221 is 122210021440461.

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

It is not a de Polignac number, because 164044120012221 - 2³¹ = 164041972528573 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164044120112221) 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, 119391644155 + ... + 119391645528.

It is an arithmetic number, because the mean of its divisors is an integer number (27460078313660).

Almost surely, 2^{164044120012221} is an apocalyptic number.

It is an amenable number.

164044120012221 is a deficient number, since it is larger than the sum of its proper divisors (55636506497059).

164044120012221 is a wasteful number, since it uses less digits than its factorization.

164044120012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238783289915.

The product of its (nonzero) digits is 6144, while the sum is 30.

Adding to 164044120012221 its reverse (122210021440461), we get a palindrome (286254141452682).

The spelling of 164044120012221 in words is "one hundred sixty-four trillion, forty-four billion, one hundred twenty million, twelve thousand, two hundred twenty-one".