20110111111111 has 24 divisors (see below), whose sum is σ = 23425225400304. Its totient is φ = 17213792682240.

The previous prime is 20110111111087. The next prime is 20110111111117. The reversal of 20110111111111 is 11111111101102.

It is not a de Polignac number, because 20110111111111 - 2¹⁹ = 20110110586823 is a prime.

20110111111111 is a modest number, since divided by 11111111 gives 201101 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 20110111111091 and 20110111111100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110111111117) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 200383501 + ... + 200483833.

It is an arithmetic number, because the mean of its divisors is an integer number (976051058346).

Almost surely, 2^{20110111111111} is an apocalyptic number.

20110111111111 is a deficient number, since it is larger than the sum of its proper divisors (3315114289193).

20110111111111 is a wasteful number, since it uses less digits than its factorization.

20110111111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105871 (or 105864 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 13.

Adding to 20110111111111 its reverse (11111111101102), we get a palindrome (31221222212213).

The spelling of 20110111111111 in words is "twenty trillion, one hundred ten billion, one hundred eleven million, one hundred eleven thousand, one hundred eleven".