20021011002112 has 144 divisors (see below), whose sum is σ = 43993776456000. Its totient is φ = 9051043921920.

The previous prime is 20021011002103. The next prime is 20021011002133. The reversal of 20021011002112 is 21120011012002.

It is a junction number, because it is equal to n+sod(n) for n = 20021011002092 and 20021011002101.

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, 24716812 + ... + 25513972.

It is an arithmetic number, because the mean of its divisors is an integer number (305512336500).

Almost surely, 2^{20021011002112} 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 20021011002112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21996888228000).

20021011002112 is an abundant number, since it is smaller than the sum of its proper divisors (23972765453888).

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

20021011002112 is a wasteful number, since it uses less digits than its factorization.

20021011002112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797422 (or 797408 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20021011002112 its reverse (21120011012002), we get a palindrome (41141022014114).

The spelling of 20021011002112 in words is "twenty trillion, twenty-one billion, eleven million, two thousand, one hundred twelve".