221102220122121 has 8 divisors (see below), whose sum is σ = 317480110944640. Its totient is φ = 136062904690512.

The previous prime is 221102220122081. The next prime is 221102220122141. The reversal of 221102220122121 is 121221022201122.

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

It is not a de Polignac number, because 221102220122121 - 2¹⁸ = 221102219859977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221102220122141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2834643847681 + ... + 2834643847758.

It is an arithmetic number, because the mean of its divisors is an integer number (39685013868080).

Almost surely, 2^{221102220122121} is an apocalyptic number.

It is an amenable number.

221102220122121 is a deficient number, since it is larger than the sum of its proper divisors (96377890822519).

221102220122121 is a wasteful number, since it uses less digits than its factorization.

221102220122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5669287695455.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 221102220122121 its reverse (121221022201122), we get a palindrome (342323242323243).

The spelling of 221102220122121 in words is "two hundred twenty-one trillion, one hundred two billion, two hundred twenty million, one hundred twenty-two thousand, one hundred twenty-one".