1200020021011 has 16 divisors (see below), whose sum is σ = 1372448896000. Its totient is φ = 1027840801248.

The previous prime is 1200020020993. The next prime is 1200020021059. The reversal of 1200020021011 is 1101200200021.

It is a cyclic number.

It is not a de Polignac number, because 1200020021011 - 2¹⁵ = 1200019988243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1200020021111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65929690 + ... + 65947888.

It is an arithmetic number, because the mean of its divisors is an integer number (85778056000).

Almost surely, 2^{1200020021011} is an apocalyptic number.

1200020021011 is a deficient number, since it is larger than the sum of its proper divisors (172428874989).

1200020021011 is a wasteful number, since it uses less digits than its factorization.

1200020021011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24538.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1200020021011 its reverse (1101200200021), we get a palindrome (2301220221032).

The spelling of 1200020021011 in words is "one trillion, two hundred billion, twenty million, twenty-one thousand, eleven".