221101212201222 has 8 divisors (see below), whose sum is σ = 442202424402456. Its totient is φ = 73700404067072.

The previous prime is 221101212201209. The next prime is 221101212201223. The reversal of 221101212201222 is 222102212101122.

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

221101212201222 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221101212201223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18425101016763 + ... + 18425101016774.

It is an arithmetic number, because the mean of its divisors is an integer number (55275303050307).

Almost surely, 2^{221101212201222} is an apocalyptic number.

221101212201222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221101212201222 is a wasteful number, since it uses less digits than its factorization.

221101212201222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36850202033542.

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

Adding to 221101212201222 its reverse (222102212101122), we get a palindrome (443203424302344).

The spelling of 221101212201222 in words is "two hundred twenty-one trillion, one hundred one billion, two hundred twelve million, two hundred one thousand, two hundred twenty-two".