210021010011020 has 192 divisors, whose sum is σ = 499349540067840. Its totient is φ = 73691400609792.

The previous prime is 210021010011013. The next prime is 210021010011023. The reversal of 210021010011020 is 20110010120012.

It is a junction number, because it is equal to n+sod(n) for n = 210021010010992 and 210021010011010.

It is not an unprimeable number, because it can be changed into a prime (210021010011023) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 62341919 + ... + 65624361.

It is an arithmetic number, because the mean of its divisors is an integer number (2600778854520).

Almost surely, 2^{210021010011020} is an apocalyptic number.

210021010011020 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 210021010011020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249674770033920).

210021010011020 is an abundant number, since it is smaller than the sum of its proper divisors (289328530056820).

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

210021010011020 is a wasteful number, since it uses less digits than its factorization.

210021010011020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3282664 (or 3282662 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 210021010011020 its reverse (20110010120012), we get a palindrome (230131020131032).

The spelling of 210021010011020 in words is "two hundred ten trillion, twenty-one billion, ten million, eleven thousand, twenty".