1200122222112 has 108 divisors (see below), whose sum is σ = 3751311899790. Its totient is φ = 363673390080.

The previous prime is 1200122222111. The next prime is 1200122222153. The reversal of 1200122222112 is 2112222210021.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1117088341776 + 83033880336 = 1056924^2 + 288156^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1200122222111) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 17184537 + ... + 17254232.

Almost surely, 2^{1200122222112} is an apocalyptic number.

1200122222112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1200122222112 is an abundant number, since it is smaller than the sum of its proper divisors (2551189677678).

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

1200122222112 is a wasteful number, since it uses less digits than its factorization.

1200122222112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34438807 (or 34438785 counting only the distinct ones).

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

Adding to 1200122222112 its reverse (2112222210021), we get a palindrome (3312344432133).

The spelling of 1200122222112 in words is "one trillion, two hundred billion, one hundred twenty-two million, two hundred twenty-two thousand, one hundred twelve".