1200021011212 has 24 divisors (see below), whose sum is σ = 2102247660240. Its totient is φ = 599379036480.

The previous prime is 1200021011209. The next prime is 1200021011219. The reversal of 1200021011212 is 2121101200021.

It is a junction number, because it is equal to n+sod(n) for n = 1200021011192 and 1200021011201.

It is not an unprimeable number, because it can be changed into a prime (1200021011219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25575918 + ... + 25622794.

It is an arithmetic number, because the mean of its divisors is an integer number (87593652510).

Almost surely, 2^{1200021011212} is an apocalyptic number.

It is an amenable number.

1200021011212 is a deficient number, since it is larger than the sum of its proper divisors (902226649028).

1200021011212 is a wasteful number, since it uses less digits than its factorization.

1200021011212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53481 (or 53479 counting only the distinct ones).

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

Adding to 1200021011212 its reverse (2121101200021), we get a palindrome (3321122211233).

The spelling of 1200021011212 in words is "one trillion, two hundred billion, twenty-one million, eleven thousand, two hundred twelve".