220001122020221 has 8 divisors (see below), whose sum is σ = 224260728972480. Its totient is φ = 215775187850592.

The previous prime is 220001122020181. The next prime is 220001122020233. The reversal of 220001122020221 is 122020221100022.

It is a happy number.

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

It is not a de Polignac number, because 220001122020221 - 2³⁴ = 219983942151037 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 220001122020221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220001122020271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8418182465 + ... + 8418208598.

It is an arithmetic number, because the mean of its divisors is an integer number (28032591121560).

Almost surely, 2^{220001122020221} is an apocalyptic number.

It is an amenable number.

220001122020221 is a deficient number, since it is larger than the sum of its proper divisors (4259606952259).

220001122020221 is a wasteful number, since it uses less digits than its factorization.

220001122020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16836391315.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 220001122020221 its reverse (122020221100022), we get a palindrome (342021343120243).

The spelling of 220001122020221 in words is "two hundred twenty trillion, one billion, one hundred twenty-two million, twenty thousand, two hundred twenty-one".