20111111120011 has 4 divisors (see below), whose sum is σ = 20111125770000. Its totient is φ = 20111096470024.

The previous prime is 20111111119949. The next prime is 20111111120017. The reversal of 20111111120011 is 11002111111102.

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 20111111120011 - 2¹⁷ = 20111110988939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20111111119973 and 20111111120000.

It is not an unprimeable number, because it can be changed into a prime (20111111120017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5025136 + ... + 8091613.

It is an arithmetic number, because the mean of its divisors is an integer number (5027781442500).

Almost surely, 2^{20111111120011} is an apocalyptic number.

20111111120011 is a deficient number, since it is larger than the sum of its proper divisors (14649989).

20111111120011 is a wasteful number, since it uses less digits than its factorization.

20111111120011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14649988.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 20111111120011 its reverse (11002111111102), we get a palindrome (31113222231113).

The spelling of 20111111120011 in words is "twenty trillion, one hundred eleven billion, one hundred eleven million, one hundred twenty thousand, eleven".