1200021121012 has 48 divisors (see below), whose sum is σ = 2406837388032. Its totient is φ = 512840148480.

The previous prime is 1200021121007. The next prime is 1200021121051. The reversal of 1200021121012 is 2101211200021.

It is a super-3 number, since 3×1200021121012³ (a number of 37 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1200021120983 and 1200021121001.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 20016193 + ... + 20076055.

It is an arithmetic number, because the mean of its divisors is an integer number (50142445584).

Almost surely, 2^{1200021121012} is an apocalyptic number.

It is an amenable number.

1200021121012 is an abundant number, since it is smaller than the sum of its proper divisors (1206816267020).

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

1200021121012 is a wasteful number, since it uses less digits than its factorization.

1200021121012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61888 (or 61886 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1200021121012 its reverse (2101211200021), we get a palindrome (3301232321033).

The spelling of 1200021121012 in words is "one trillion, two hundred billion, twenty-one million, one hundred twenty-one thousand, twelve".