221222101200 has 60 divisors (see below), whose sum is σ = 708648134688. Its totient is φ = 58992560000.

The previous prime is 221222101153. The next prime is 221222101223. The reversal of 221222101200 is 2101222122.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 221222101200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 92174676 + ... + 92177075.

Almost surely, 2^221222101200 is an apocalyptic number.

221222101200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221222101200 is an abundant number, since it is smaller than the sum of its proper divisors (487426033488).

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

221222101200 is a wasteful number, since it uses less digits than its factorization.

221222101200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184351772 (or 184351761 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 221222101200 its reverse (2101222122), we get a palindrome (223323323322).

The spelling of 221222101200 in words is "two hundred twenty-one billion, two hundred twenty-two million, one hundred one thousand, two hundred".