220101212221 has 8 divisors (see below), whose sum is σ = 240117401088. Its totient is φ = 200086188000.

The previous prime is 220101212203. The next prime is 220101212231. The reversal of 220101212221 is 122212101022.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 220101212221 - 2⁵ = 220101212189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220101212195 and 220101212204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220101212231) 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, 130561 + ... + 676201.

It is an arithmetic number, because the mean of its divisors is an integer number (30014675136).

Almost surely, 2^220101212221 is an apocalyptic number.

It is an amenable number.

220101212221 is a deficient number, since it is larger than the sum of its proper divisors (20016188867).

220101212221 is a wasteful number, since it uses less digits than its factorization.

220101212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 582323.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 220101212221 its reverse (122212101022), we get a palindrome (342313313243).

The spelling of 220101212221 in words is "two hundred twenty billion, one hundred one million, two hundred twelve thousand, two hundred twenty-one".