20100111020112 has 20 divisors (see below), whose sum is σ = 51925286802080. Its totient is φ = 6700037006688.

The previous prime is 20100111020111. The next prime is 20100111020113. The reversal of 20100111020112 is 21102011100102.

It is an interprime number because it is at equal distance from previous prime (20100111020111) and next prime (20100111020113).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20100111020111) 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, 209376156412 + ... + 209376156507.

It is an arithmetic number, because the mean of its divisors is an integer number (2596264340104).

Almost surely, 2^{20100111020112} is an apocalyptic number.

It is an amenable number.

20100111020112 is an abundant number, since it is smaller than the sum of its proper divisors (31825175781968).

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

20100111020112 is a wasteful number, since it uses less digits than its factorization.

20100111020112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418752312930 (or 418752312924 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20100111020112 its reverse (21102011100102), we get a palindrome (41202122120214).

The spelling of 20100111020112 in words is "twenty trillion, one hundred billion, one hundred eleven million, twenty thousand, one hundred twelve".