210021121020000 has 120 divisors (see below), whose sum is σ = 688911281366616. Its totient is φ = 56005632256000.

The previous prime is 210021121019903. The next prime is 210021121020023. The reversal of 210021121020000 is 20121120012.

It is a tau number, because it is divible by the number of its divisors (120).

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

It is a congruent number.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 1750116009 + ... + 1750236008.

Almost surely, 2^{210021121020000} is an apocalyptic number.

210021121020000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210021121020000 is an abundant number, since it is smaller than the sum of its proper divisors (478890160346616).

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

210021121020000 is an equidigital number, since it uses as much as digits as its factorization.

210021121020000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3500352050 (or 3500352027 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 210021121020000 its reverse (20121120012), we get a palindrome (210041242140012).

The spelling of 210021121020000 in words is "two hundred ten trillion, twenty-one billion, one hundred twenty-one million, twenty thousand".