210021002021020 has 24 divisors (see below), whose sum is σ = 441045461325168. Its totient is φ = 84008142316800.

The previous prime is 210021002020997. The next prime is 210021002021029. The reversal of 210021002021020 is 20120200120012.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210021002021029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9424941 + ... + 22558180.

It is an arithmetic number, because the mean of its divisors is an integer number (18376894221882).

Almost surely, 2^{210021002021020} is an apocalyptic number.

210021002021020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210021002021020 is an abundant number, since it is smaller than the sum of its proper divisors (231024459304148).

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

210021002021020 is a wasteful number, since it uses less digits than its factorization.

210021002021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32311461 (or 32311459 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 210021002021020 its reverse (20120200120012), we get a palindrome (230141202141032).

The spelling of 210021002021020 in words is "two hundred ten trillion, twenty-one billion, two million, twenty-one thousand, twenty".