221751324705104 has 20 divisors (see below), whose sum is σ = 429713268986400. Its totient is φ = 110857577869920.

The previous prime is 221751324704983. The next prime is 221751324705161. The reversal of 221751324705104 is 401507423157122.

It is a super-2 number, since 2×221751324705104² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1130179004 + ... + 1130375195.

It is an arithmetic number, because the mean of its divisors is an integer number (21485663449320).

Almost surely, 2^{221751324705104} is an apocalyptic number.

It is an amenable number.

221751324705104 is a deficient number, since it is larger than the sum of its proper divisors (207961944281296).

221751324705104 is a wasteful number, since it uses less digits than its factorization.

221751324705104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2260560338 (or 2260560332 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 44.

The spelling of 221751324705104 in words is "two hundred twenty-one trillion, seven hundred fifty-one billion, three hundred twenty-four million, seven hundred five thousand, one hundred four".