20111202112011 has 16 divisors (see below), whose sum is σ = 27170947804416. Its totient is φ = 13230382175136.

The previous prime is 20111202112009. The next prime is 20111202112109. The reversal of 20111202112011 is 11021120211102.

It is a happy number.

It is not a de Polignac number, because 20111202112011 - 2¹ = 20111202112009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20111202112811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114903360 + ... + 115078253.

It is an arithmetic number, because the mean of its divisors is an integer number (1698184237776).

Almost surely, 2^{20111202112011} is an apocalyptic number.

20111202112011 is a deficient number, since it is larger than the sum of its proper divisors (7059745692405).

20111202112011 is a wasteful number, since it uses less digits than its factorization.

20111202112011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229982002.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 20111202112011 its reverse (11021120211102), we get a palindrome (31132322323113).

The spelling of 20111202112011 in words is "twenty trillion, one hundred eleven billion, two hundred two million, one hundred twelve thousand, eleven".