1200020312011 has 16 divisors (see below), whose sum is σ = 1243853942400. Its totient is φ = 1156351795200.

The previous prime is 1200020312009. The next prime is 1200020312039. The reversal of 1200020312011 is 1102130200021.

It is a cyclic number.

It is not a de Polignac number, because 1200020312011 - 2¹ = 1200020312009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200020311982 and 1200020312000.

It is not an unprimeable number, because it can be changed into a prime (1200020312311) 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 15 ways as a sum of consecutive naturals, for example, 49639135 + ... + 49663303.

It is an arithmetic number, because the mean of its divisors is an integer number (77740871400).

Almost surely, 2^{1200020312011} is an apocalyptic number.

1200020312011 is a deficient number, since it is larger than the sum of its proper divisors (43833630389).

1200020312011 is a wasteful number, since it uses less digits than its factorization.

1200020312011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27510.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 1200020312011 its reverse (1102130200021), we get a palindrome (2302150512032).

The spelling of 1200020312011 in words is "one trillion, two hundred billion, twenty million, three hundred twelve thousand, eleven".