20011111111112 has 16 divisors (see below), whose sum is σ = 40931818182000. Its totient is φ = 9095959595920.

The previous prime is 20011111111039. The next prime is 20011111111213. The reversal of 20011111111112 is 21111111111002.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113699494862 + ... + 113699495037.

It is an arithmetic number, because the mean of its divisors is an integer number (2558238636375).

Almost surely, 2^{20011111111112} is an apocalyptic number.

20011111111112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20011111111112 is an abundant number, since it is smaller than the sum of its proper divisors (20920707070888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20011111111112 is a wasteful number, since it uses less digits than its factorization.

20011111111112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227398989916 (or 227398989912 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 14.

Adding to 20011111111112 its reverse (21111111111002), we get a palindrome (41122222222114).

The spelling of 20011111111112 in words is "twenty trillion, eleven billion, one hundred eleven million, one hundred eleven thousand, one hundred twelve".