1200222222012 has 144 divisors (see below), whose sum is σ = 3391286895360. Its totient is φ = 354743020800.

The previous prime is 1200222222011. The next prime is 1200222222047. The reversal of 1200222222012 is 2102222220021.

It is a super-2 number, since 2×1200222222012² (a number of 25 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200222222011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 91872993 + ... + 91886055.

It is an arithmetic number, because the mean of its divisors is an integer number (23550603440).

Almost surely, 2^{1200222222012} is an apocalyptic number.

1200222222012 is a gapful number since it is divisible by the number (12) 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 1200222222012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1695643447680).

1200222222012 is an abundant number, since it is smaller than the sum of its proper divisors (2191064673348).

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

1200222222012 is a wasteful number, since it uses less digits than its factorization.

1200222222012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18784 (or 18779 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 1200222222012 its reverse (2102222220021), we get a palindrome (3302444442033).

The spelling of 1200222222012 in words is "one trillion, two hundred billion, two hundred twenty-two million, two hundred twenty-two thousand, twelve".