1200021022011 has 24 divisors (see below), whose sum is σ = 1970742810960. Its totient is φ = 645389455872.

The previous prime is 1200021022009. The next prime is 1200021022051. The reversal of 1200021022011 is 1102201200021.

It is not a de Polignac number, because 1200021022011 - 2¹ = 1200021022009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1200021022051) 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 23 ways as a sum of consecutive naturals, for example, 240097746 + ... + 240102743.

It is an arithmetic number, because the mean of its divisors is an integer number (82114283790).

Almost surely, 2^{1200021022011} is an apocalyptic number.

1200021022011 is a deficient number, since it is larger than the sum of its proper divisors (770721788949).

1200021022011 is a wasteful number, since it uses less digits than its factorization.

1200021022011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480200523 (or 480200516 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1200021022011 its reverse (1102201200021), we get a palindrome (2302222222032).

The spelling of 1200021022011 in words is "one trillion, two hundred billion, twenty-one million, twenty-two thousand, eleven".