221220222120101 has 16 divisors (see below), whose sum is σ = 227575225963008. Its totient is φ = 214911765993600.

The previous prime is 221220222120077. The next prime is 221220222120151. The reversal of 221220222120101 is 101021222022122.

It is a cyclic number.

It is not a de Polignac number, because 221220222120101 - 2³⁸ = 220945344213157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221220222120151) 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, 15132191 + ... + 25911843.

It is an arithmetic number, because the mean of its divisors is an integer number (14223451622688).

Almost surely, 2^{221220222120101} is an apocalyptic number.

It is an amenable number.

221220222120101 is a deficient number, since it is larger than the sum of its proper divisors (6355003842907).

221220222120101 is a wasteful number, since it uses less digits than its factorization.

221220222120101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10781812.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 221220222120101 its reverse (101021222022122), we get a palindrome (322241444142223).

The spelling of 221220222120101 in words is "two hundred twenty-one trillion, two hundred twenty billion, two hundred twenty-two million, one hundred twenty thousand, one hundred one".