21020131020000 has 480 divisors, whose sum is σ = 82226403528192. Its totient is φ = 4595703552000.

The previous prime is 21020131019989. The next prime is 21020131020001. The reversal of 21020131020000 is 2013102012.

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020131020001) by changing a digit.

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 79 ways as a sum of consecutive naturals, for example, 8572002 + ... + 10747998.

Almost surely, 2^{21020131020000} is an apocalyptic number.

21020131020000 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 21020131020000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41113201764096).

21020131020000 is an abundant number, since it is smaller than the sum of its proper divisors (61206272508192).

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

21020131020000 is a wasteful number, since it uses less digits than its factorization.

21020131020000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2176060 (or 2176037 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 21020131020000 its reverse (2013102012), we get a palindrome (21022144122012).

The spelling of 21020131020000 in words is "twenty-one trillion, twenty billion, one hundred thirty-one million, twenty thousand".