21455032105201 has 8 divisors (see below), whose sum is σ = 22149068300264. Its totient is φ = 20767004881920.

The previous prime is 21455032105187. The next prime is 21455032105219. The reversal of 21455032105201 is 10250123055412.

It can be written as a sum of positive squares in 4 ways, for example, as 3380630145201 + 18074401960000 = 1838649^2 + 4251400^2 .

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 21455032105201 - 2⁹ = 21455032104689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21455032105231) 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, 1502235690 + ... + 1502249971.

It is an arithmetic number, because the mean of its divisors is an integer number (2768633537533).

Almost surely, 2^{21455032105201} is an apocalyptic number.

It is an amenable number.

21455032105201 is a deficient number, since it is larger than the sum of its proper divisors (694036195063).

21455032105201 is a wasteful number, since it uses less digits than its factorization.

21455032105201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3004485891.

The product of its (nonzero) digits is 12000, while the sum is 31.

The spelling of 21455032105201 in words is "twenty-one trillion, four hundred fifty-five billion, thirty-two million, one hundred five thousand, two hundred one".