21010002020000 has 480 divisors, whose sum is σ = 62338988638080. Its totient is φ = 6806937600000.

The previous prime is 21010002019957. The next prime is 21010002020017. The reversal of 21010002020000 is 2020001012.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a self number, because there is not a number n which added to its sum of digits gives 21010002020000.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1066650152 + ... + 1066669848.

It is an arithmetic number, because the mean of its divisors is an integer number (129872892996).

Almost surely, 2^{21010002020000} is an apocalyptic number.

21010002020000 is a gapful number since it is divisible by the number (20) 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 21010002020000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31169494319040).

21010002020000 is an abundant number, since it is smaller than the sum of its proper divisors (41328986618080).

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

21010002020000 is a wasteful number, since it uses less digits than its factorization.

21010002020000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20154 (or 20131 counting only the distinct ones).

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

Adding to 21010002020000 its reverse (2020001012), we get a palindrome (21012022021012).

The spelling of 21010002020000 in words is "twenty-one trillion, ten billion, two million, twenty thousand".