20001110122112 has 128 divisors (see below), whose sum is σ = 48269922900480. Its totient is φ = 8058813235200.

The previous prime is 20001110121991. The next prime is 20001110122157. The reversal of 20001110122112 is 21122101110002.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×20001110122112² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13155662 + ... + 14597042.

It is an arithmetic number, because the mean of its divisors is an integer number (377108772660).

Almost surely, 2^{20001110122112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20001110122112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24134961450240).

20001110122112 is an abundant number, since it is smaller than the sum of its proper divisors (28268812778368).

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

20001110122112 is a wasteful number, since it uses less digits than its factorization.

20001110122112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1442330 (or 1442318 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20001110122112 its reverse (21122101110002), we get a palindrome (41123211232114).

The spelling of 20001110122112 in words is "twenty trillion, one billion, one hundred ten million, one hundred twenty-two thousand, one hundred twelve".