221021200220001 has 16 divisors (see below), whose sum is σ = 301320170647104. Its totient is φ = 144071451823104.

The previous prime is 221021200219957. The next prime is 221021200220063. The reversal of 221021200220001 is 100022002120122.

It is not a de Polignac number, because 221021200220001 - 2¹⁷ = 221021200088929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221021200220201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4575415756 + ... + 4575464061.

It is an arithmetic number, because the mean of its divisors is an integer number (18832510665444).

Almost surely, 2^{221021200220001} is an apocalyptic number.

It is an amenable number.

221021200220001 is a deficient number, since it is larger than the sum of its proper divisors (80298970427103).

221021200220001 is an equidigital number, since it uses as much as digits as its factorization.

221021200220001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9150880000.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 221021200220001 its reverse (100022002120122), we get a palindrome (321043202340123).

The spelling of 221021200220001 in words is "two hundred twenty-one trillion, twenty-one billion, two hundred million, two hundred twenty thousand, one".