1000222221200 has 120 divisors (see below), whose sum is σ = 2531836300320. Its totient is φ = 378682905600.

The previous prime is 1000222221197. The next prime is 1000222221217. The reversal of 1000222221200 is 21222220001.

1000222221200 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8277215 + ... + 8397185.

It is an arithmetic number, because the mean of its divisors is an integer number (21098635836).

Almost surely, 2^{1000222221200} is an apocalyptic number.

1000222221200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1000222221200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1265918150160).

1000222221200 is an abundant number, since it is smaller than the sum of its proper divisors (1531614079120).

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

1000222221200 is a wasteful number, since it uses less digits than its factorization.

1000222221200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121105 (or 121094 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 1000222221200 its reverse (21222220001), we get a palindrome (1021444441201).

The spelling of 1000222221200 in words is "one trillion, two hundred twenty-two million, two hundred twenty-one thousand, two hundred".