21055110554201 has 8 divisors (see below), whose sum is σ = 23466996283680. Its totient is φ = 18773597026368.

The previous prime is 21055110554197. The next prime is 21055110554213. The reversal of 21055110554201 is 10245501155012.

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 21055110554201 - 2² = 21055110554197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21055110553201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32593050071 + ... + 32593050716.

It is an arithmetic number, because the mean of its divisors is an integer number (2933374535460).

Almost surely, 2^{21055110554201} is an apocalyptic number.

It is an amenable number.

21055110554201 is a deficient number, since it is larger than the sum of its proper divisors (2411885729479).

21055110554201 is a wasteful number, since it uses less digits than its factorization.

21055110554201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65186100823.

The product of its (nonzero) digits is 10000, while the sum is 32.

The spelling of 21055110554201 in words is "twenty-one trillion, fifty-five billion, one hundred ten million, five hundred fifty-four thousand, two hundred one".