20011100120011 has 32 divisors (see below), whose sum is σ = 27128905509888. Its totient is φ = 14253854739840.

The previous prime is 20011100119951. The next prime is 20011100120021. The reversal of 20011100120011 is 11002100111002.

It is a cyclic number.

It is not a de Polignac number, because 20011100120011 - 2³⁹ = 19461344306123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20011100120011.

It is not an unprimeable number, because it can be changed into a prime (20011100120021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 96941116 + ... + 97147321.

It is an arithmetic number, because the mean of its divisors is an integer number (847778297184).

Almost surely, 2^{20011100120011} is an apocalyptic number.

20011100120011 is a deficient number, since it is larger than the sum of its proper divisors (7117805389877).

20011100120011 is a wasteful number, since it uses less digits than its factorization.

20011100120011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194088571.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 20011100120011 its reverse (11002100111002), we get a palindrome (31013200231013).

Subtracting from 20011100120011 its reverse (11002100111002), we obtain a palindrome (9009000009009).

The spelling of 20011100120011 in words is "twenty trillion, eleven billion, one hundred million, one hundred twenty thousand, eleven".