20110021020000 has 720 divisors, whose sum is σ = 75591636408288. Its totient is φ = 5059169280000.

The previous prime is 20110021019999. The next prime is 20110021020059. The reversal of 20110021020000 is 2012001102.

It is a tau number, because it is divible by the number of its divisors (720).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 302186730 + ... + 302253270.

Almost surely, 2^{20110021020000} is an apocalyptic number.

20110021020000 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 20110021020000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37795818204144).

20110021020000 is an abundant number, since it is smaller than the sum of its proper divisors (55481615388288).

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

20110021020000 is a wasteful number, since it uses less digits than its factorization.

20110021020000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66673 (or 66647 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20110021020000 its reverse (2012001102), we get a palindrome (20112033021102).

The spelling of 20110021020000 in words is "twenty trillion, one hundred ten billion, twenty-one million, twenty thousand".