20111111202112 has 28 divisors (see below), whose sum is σ = 45609127191520. Its totient is φ = 8619047657856.

The previous prime is 20111111202097. The next prime is 20111111202113. The reversal of 20111111202112 is 21120211111102.

It is a tau number, because it is divible by the number of its divisors (28).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111111202113) 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, 22445436162 + ... + 22445437057.

Almost surely, 2^{20111111202112} is an apocalyptic number.

It is an amenable number.

20111111202112 is an abundant number, since it is smaller than the sum of its proper divisors (25498015989408).

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

20111111202112 is an equidigital number, since it uses as much as digits as its factorization.

20111111202112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44890873238 (or 44890873228 counting only the distinct ones).

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

Adding to 20111111202112 its reverse (21120211111102), we get a palindrome (41231322313214).

The spelling of 20111111202112 in words is "twenty trillion, one hundred eleven billion, one hundred eleven million, two hundred two thousand, one hundred twelve".