1200021112012 has 24 divisors (see below), whose sum is σ = 2169112816640. Its totient is φ = 580298392080.

The previous prime is 1200021111973. The next prime is 1200021112019. The reversal of 1200021112012 is 2102111200021.

It is a junction number, because it is equal to n+sod(n) for n = 1200021111983 and 1200021112001.

It is not an unprimeable number, because it can be changed into a prime (1200021112019) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2772312 + ... + 3175807.

Almost surely, 2^{1200021112012} is an apocalyptic number.

It is an amenable number.

1200021112012 is a deficient number, since it is larger than the sum of its proper divisors (969091704628).

1200021112012 is a wasteful number, since it uses less digits than its factorization.

1200021112012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5949781 (or 5949779 counting only the distinct ones).

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

Adding to 1200021112012 its reverse (2102111200021), we get a palindrome (3302132312033).

The spelling of 1200021112012 in words is "one trillion, two hundred billion, twenty-one million, one hundred twelve thousand, twelve".