110121212212221 has 16 divisors (see below), whose sum is σ = 167803899859584. Its totient is φ = 62926351509504.

The previous prime is 110121212212217. The next prime is 110121212212279. The reversal of 110121212212221 is 122212212121011.

It is not a de Polignac number, because 110121212212221 - 2² = 110121212212217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110121212216221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40655965 + ... + 43279901.

It is an arithmetic number, because the mean of its divisors is an integer number (10487743741224).

Almost surely, 2^{110121212212221} is an apocalyptic number.

It is an amenable number.

110121212212221 is a deficient number, since it is larger than the sum of its proper divisors (57682687647363).

110121212212221 is a wasteful number, since it uses less digits than its factorization.

110121212212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4622420.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 110121212212221 its reverse (122212212121011), we get a palindrome (232333424333232).

The spelling of 110121212212221 in words is "one hundred ten trillion, one hundred twenty-one billion, two hundred twelve million, two hundred twelve thousand, two hundred twenty-one".