221010220001 has 4 divisors (see below), whose sum is σ = 228631262100. Its totient is φ = 213389177904.

The previous prime is 221010219971. The next prime is 221010220007. The reversal of 221010220001 is 100022010122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 92978645776 + 128031574225 = 304924^2 + 357815^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221010220001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221010220007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3810521006 + ... + 3810521063.

It is an arithmetic number, because the mean of its divisors is an integer number (57157815525).

Almost surely, 2^221010220001 is an apocalyptic number.

It is an amenable number.

221010220001 is a deficient number, since it is larger than the sum of its proper divisors (7621042099).

221010220001 is an equidigital number, since it uses as much as digits as its factorization.

221010220001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7621042098.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 221010220001 its reverse (100022010122), we get a palindrome (321032230123).

The spelling of 221010220001 in words is "two hundred twenty-one billion, ten million, two hundred twenty thousand, one".