1200112221222 has 40 divisors (see below), whose sum is σ = 2691728925600. Its totient is φ = 399652329456.

The previous prime is 1200112221149. The next prime is 1200112221257. The reversal of 1200112221222 is 2221222110021.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1200112221195 and 1200112221204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3396697 + ... + 3733332.

It is an arithmetic number, because the mean of its divisors is an integer number (67293223140).

Almost surely, 2^{1200112221222} is an apocalyptic number.

1200112221222 is an abundant number, since it is smaller than the sum of its proper divisors (1491616704378).

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

1200112221222 is a wasteful number, since it uses less digits than its factorization.

1200112221222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7131082 (or 7131073 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1200112221222 its reverse (2221222110021), we get a palindrome (3421334331243).

The spelling of 1200112221222 in words is "one trillion, two hundred billion, one hundred twelve million, two hundred twenty-one thousand, two hundred twenty-two".