1200221121012 has 144 divisors (see below), whose sum is σ = 2958512272128. Its totient is φ = 378513907200.

The previous prime is 1200221120983. The next prime is 1200221121017. The reversal of 1200221121012 is 2101211220021.

It is a junction number, because it is equal to n+sod(n) for n = 1200221120982 and 1200221121000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200221121017) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 121217262 + ... + 121227162.

It is an arithmetic number, because the mean of its divisors is an integer number (20545224112).

Almost surely, 2^{1200221121012} is an apocalyptic number.

1200221121012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1200221121012 is an abundant number, since it is smaller than the sum of its proper divisors (1758291151116).

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

1200221121012 is a wasteful number, since it uses less digits than its factorization.

1200221121012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10186 (or 10147 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1200221121012 its reverse (2101211220021), we get a palindrome (3301432341033).

Subtracting 1200221121012 from its reverse (2101211220021), we obtain a palindrome (900990099009).

The spelling of 1200221121012 in words is "one trillion, two hundred billion, two hundred twenty-one million, one hundred twenty-one thousand, twelve".