1200022221112 has 64 divisors (see below), whose sum is σ = 2644714800000. Its totient is φ = 503256455040.

The previous prime is 1200022221103. The next prime is 1200022221113. The reversal of 1200022221112 is 2111222200021.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200022221113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2060139 + ... + 2577637.

It is an arithmetic number, because the mean of its divisors is an integer number (41323668750).

Almost surely, 2^{1200022221112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1200022221112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1322357400000).

1200022221112 is an abundant number, since it is smaller than the sum of its proper divisors (1444692578888).

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

1200022221112 is a wasteful number, since it uses less digits than its factorization.

1200022221112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519556 (or 519552 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1200022221112 its reverse (2111222200021), we get a palindrome (3311244421133).

The spelling of 1200022221112 in words is "one trillion, two hundred billion, twenty-two million, two hundred twenty-one thousand, one hundred twelve".