20201021201112 has 128 divisors (see below), whose sum is σ = 52578307353600. Its totient is φ = 6462066124800.

The previous prime is 20201021201111. The next prime is 20201021201219. The reversal of 20201021201112 is 21110212010202.

It is a super-2 number, since 2×20201021201112² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20201021201091 and 20201021201100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201021201111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67969312 + ... + 68265872.

It is an arithmetic number, because the mean of its divisors is an integer number (410768026200).

Almost surely, 2^{20201021201112} 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 20201021201112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26289153676800).

20201021201112 is an abundant number, since it is smaller than the sum of its proper divisors (32377286152488).

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

20201021201112 is a wasteful number, since it uses less digits than its factorization.

20201021201112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297657 (or 297653 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20201021201112 its reverse (21110212010202), we get a palindrome (41311233211314).

The spelling of 20201021201112 in words is "twenty trillion, two hundred one billion, twenty-one million, two hundred one thousand, one hundred twelve".