1200020001011 has 4 divisors (see below), whose sum is σ = 1292329231872. Its totient is φ = 1107710770152.

The previous prime is 1200020001007. The next prime is 1200020001071. The reversal of 1200020001011 is 1101000200021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1200020001011 - 2² = 1200020001007 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1200020001011.

It is not an unprimeable number, because it can be changed into a prime (1200020001071) 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 3 ways as a sum of consecutive naturals, for example, 46154615411 + ... + 46154615436.

It is an arithmetic number, because the mean of its divisors is an integer number (323082307968).

Almost surely, 2^{1200020001011} is an apocalyptic number.

1200020001011 is a deficient number, since it is larger than the sum of its proper divisors (92309230861).

1200020001011 is an equidigital number, since it uses as much as digits as its factorization.

1200020001011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92309230860.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 1200020001011 its reverse (1101000200021), we get a palindrome (2301020201032).

It can be divided in two parts, 12000200010 and 11, that added together give a palindrome (12000200021).

The spelling of 1200020001011 in words is "one trillion, two hundred billion, twenty million, one thousand, eleven".