1200100221222 has 128 divisors (see below), whose sum is σ = 2995593216000. Its totient is φ = 312779491200.

The previous prime is 1200100221217. The next prime is 1200100221233. The reversal of 1200100221222 is 2221220010021.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4800972 + ... + 5044752.

It is an arithmetic number, because the mean of its divisors is an integer number (23403072000).

Almost surely, 2^{1200100221222} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1200100221222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1497796608000).

1200100221222 is an abundant number, since it is smaller than the sum of its proper divisors (1795492994778).

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

1200100221222 is a wasteful number, since it uses less digits than its factorization.

1200100221222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244042.

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

Adding to 1200100221222 its reverse (2221220010021), we get a palindrome (3421320231243).

The spelling of 1200100221222 in words is "one trillion, two hundred billion, one hundred million, two hundred twenty-one thousand, two hundred twenty-two".