221001112200021 has 8 divisors (see below), whose sum is σ = 302632153643424. Its totient is φ = 143352072778320.

The previous prime is 221001112200007. The next prime is 221001112200049. The reversal of 221001112200021 is 120002211100122.

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

It is not a de Polignac number, because 221001112200021 - 2¹¹ = 221001112197973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221001112200821) 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, 995500505295 + ... + 995500505516.

It is an arithmetic number, because the mean of its divisors is an integer number (37829019205428).

Almost surely, 2^{221001112200021} is an apocalyptic number.

It is an amenable number.

221001112200021 is a deficient number, since it is larger than the sum of its proper divisors (81631041443403).

221001112200021 is a wasteful number, since it uses less digits than its factorization.

221001112200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1991001010851.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 221001112200021 its reverse (120002211100122), we get a palindrome (341003323300143).

The spelling of 221001112200021 in words is "two hundred twenty-one trillion, one billion, one hundred twelve million, two hundred thousand, twenty-one".