12021100010020 has 96 divisors (see below), whose sum is σ = 25965631351296. Its totient is φ = 4672017100800.

The previous prime is 12021100009973. The next prime is 12021100010027. The reversal of 12021100010020 is 2001000112021.

12021100010020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 12021100009979 and 12021100010006.

It is not an unprimeable number, because it can be changed into a prime (12021100010027) 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, 658428732 + ... + 658446988.

It is an arithmetic number, because the mean of its divisors is an integer number (270475326576).

Almost surely, 2^{12021100010020} is an apocalyptic number.

12021100010020 is a gapful number since it is divisible by the number (10) 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 12021100010020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12982815675648).

12021100010020 is an abundant number, since it is smaller than the sum of its proper divisors (13944531341276).

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

12021100010020 is a wasteful number, since it uses less digits than its factorization.

12021100010020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21541 (or 21539 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 12021100010020 its reverse (2001000112021), we get a palindrome (14022100122041).

The spelling of 12021100010020 in words is "twelve trillion, twenty-one billion, one hundred million, ten thousand, twenty".