221222120012201 has 16 divisors (see below), whose sum is σ = 275811659479680. Its totient is φ = 172379458298880.

The previous prime is 221222120012171. The next prime is 221222120012351. The reversal of 221222120012201 is 102210021222122.

It is not a de Polignac number, because 221222120012201 - 2²² = 221222115817897 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (221222120012401) 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 15 ways as a sum of consecutive naturals, for example, 2292536 + ... + 21158921.

It is an arithmetic number, because the mean of its divisors is an integer number (17238228717480).

Almost surely, 2^{221222120012201} is an apocalyptic number.

It is an amenable number.

221222120012201 is a deficient number, since it is larger than the sum of its proper divisors (54589539467479).

221222120012201 is a wasteful number, since it uses less digits than its factorization.

221222120012201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23573984.

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

Adding to 221222120012201 its reverse (102210021222122), we get a palindrome (323432141234323).

The spelling of 221222120012201 in words is "two hundred twenty-one trillion, two hundred twenty-two billion, one hundred twenty million, twelve thousand, two hundred one".