1001202022221 has 16 divisors (see below), whose sum is σ = 1339228258944. Its totient is φ = 665324895744.

The previous prime is 1001202022193. The next prime is 1001202022253. The reversal of 1001202022221 is 1222202021001.

It is not a de Polignac number, because 1001202022221 - 2⁵ = 1001202022189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1001202022221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001202022321) 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, 965736 + ... + 1713198.

It is an arithmetic number, because the mean of its divisors is an integer number (83701766184).

Almost surely, 2^{1001202022221} is an apocalyptic number.

It is an amenable number.

1001202022221 is a deficient number, since it is larger than the sum of its proper divisors (338026236723).

1001202022221 is an equidigital number, since it uses as much as digits as its factorization.

1001202022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 748900.

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

Adding to 1001202022221 its reverse (1222202021001), we get a palindrome (2223404043222).

The spelling of 1001202022221 in words is "one trillion, one billion, two hundred two million, twenty-two thousand, two hundred twenty-one".