20111111022112 has 96 divisors (see below), whose sum is σ = 43591275633024. Its totient is φ = 9057220300800.

The previous prime is 20111111022029. The next prime is 20111111022179. The reversal of 20111111022112 is 21122011111102.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110924238 + ... + 111105394.

It is an arithmetic number, because the mean of its divisors is an integer number (454075787844).

Almost surely, 2^{20111111022112} is an apocalyptic number.

20111111022112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20111111022112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21795637816512).

20111111022112 is an abundant number, since it is smaller than the sum of its proper divisors (23480164610912).

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

20111111022112 is a wasteful number, since it uses less digits than its factorization.

20111111022112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184082 (or 184074 counting only the distinct ones).

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

Adding to 20111111022112 its reverse (21122011111102), we get a palindrome (41233122133214).

It can be divided in two parts, 2011111102 and 2112, that multiplied together give a palindrome (4247466647424).

The spelling of 20111111022112 in words is "twenty trillion, one hundred eleven billion, one hundred eleven million, twenty-two thousand, one hundred twelve".